I absolutely love this game: its brilliant mechanics, gorgeus art and how well it conveys the LOTR flavor. When I play some quests I cannot help but think they're simply awesome and wish I could share this opinion with other people who enjoy this game as much as I do, so here it goes: if you've ever felt the same, this is the place for you! :-D
Besides this, I'm curious of knowing which quests are considered the best by the community: from what I can see there is a lot of fine strategic talk going on in this forum, but it seems to me that 'metagame' discussion is a bit lacking. If I'm wrong, feel free to point me some good thread!
So, here are my favorite quests and why!
The ones I've played so far:
Core Set + SoM: all
Khazad-dum + Dwarrowdelf : none, due to KD being unavailable until recently.
Heirs of Numenor + Against the Shadow: all except The Steward's Fear (unavailable).
Voice of Isengard + The Ring-Maker : all
Saga: none (I already have my hands full with regular ones, will surely play them threafter)
POD: Massing at Osgiliath, Battle of Lake-Town, Stone of Erech
Nightmare: Passage through Mirkwood, Journey along the Anduin, Conflict at the Carrock (the last one bought following the advice from TftC)
The ones I liked the most are all those from the Heirs expansion, a couple from the RM cycle and the POD ones. Other favorites are JatA, RtM and to Catch an Orc. The Nightmare ones are very good too.
Passage through Mirkwood: I like the flavor a lot and it's quick, so it's good for when you want a lighter game. Nightmare version improves it, but it's not spectacular.
Journey along the Anduin: truly a classic! this quest is very funny, balanced (since it covers all the aspects of the game) and rewarding. By far the one I played the most, very ingenuous! The final showdown after being Ambushed on the Shore is always a tense moment.
Escape from Dol-Guldur: too hard for solo entirely due to setup; the theme is off, looking forward to playing NM since it seems like it vastly imrpoves the theme.
Conflict at the Carrock: one of the first quests I've played. Good, but I'm not a fan of it. NM improves both mechanics and theme, but it still doesn't impress me as other quests even though I like it.
Return to Mirkwood: unfortunately I played it the first time only after playing the quests from HoN due to availability issues, so I found it a bit underwhelming with the current card pool but it seems a well made quest. Looking forward to NM for this one too.
All in all, the only quests that stands out for me from the CS+SoM is JatA.
Peril in Pelargir: a very very good quest! I love it. I remember well when I first played it I expected to beat it quite easily as it had the fame of being the easiest of the HoN quests; as it turned out, it's not easy at all! I managed to beat, but only after some intensive deckbuilding. The only complaint I have is with the Scroll mechanic, which doesn't really add any tension. Having seen NM cards for this, it seems like this is going to be completely fixed though.
Into Ithilien: another quest I love! it surely is punishing at times, but the constant risk I'm facing makes every moment memorable. One of my top 5 quests.
The Siege of Cair Andros: this probably is my favorite quest in the whole game - I love the mechanics and I really feel like I'm trying to resist while facing unsormountable odds! when I get to the Last Battle I feel a mixture of relief and resolve as I prepare for the fight.. wonderful!
Assault on Osgiliath: solo is pathetic, but after playing it with 3-4 players thanks to OCTGN and some fellow gamers I met there, I completely changed my mind: very funny, and one I'd really like to play again. The only criticism I have is that it's not quite as hard as I expected, as the "chief" enemies are not very challenging. And the quest itself having Battle, too: would have made much more sense.
Blood of Gondor: very good quest, I like a lot the flavor and the mechanic. Challenging to play too, it requires quite a peculiar playstyle.
The Morgul Vale: ouch! This one is brutal: it basically forces you to go Spirt heavy to keep your threat low and be able to quest yourself out the horrible spot you're in at the start of the game. Once one understands that you have to avoid combat as much as possible it becomes a lot easier (but still hard). I don't really want to know how playing it NM version will be like! :-D
HoN+AtS is my favorite cycle so far: I loved the idea of battle/siege since it makes it harder to just pump out questing power and rush to the win, especially since many quests switch from one mode to another during the course of the game; it forces your deck to be varied and to consider all stats of allies/heroes you have, also providing a much-needed break from mass WP spirit ally-armies.
I really hope this is a mechanic we're going to meet again in the future, as it helps keep the game fresh for me and seems very appropriate thematically.
To Catch an Orc: nice quest, very tense. Not one of the best due to the random factor invplved in the Search mechanic: the game can last way too long if Mugash is near the bottom.
The Three Trials: wonderful quest, both from a thematic and mechanic point of view: creepy theme and artwork, and an excellent concept. The best from VoI+RM, imo.
The Nin-in-Eilph: this is a controversial quest from what I've read, but I really like it. In fact, for me it is in par with tTT: I love the flavor (marshes have always intrigued me) and I love how the gameplay reflects the flavor of the quest: even the best deck will feel like crawling, being constantly hindered until the final confrontantion. Brilliant! not a quest you can play with every deck though.
The Antlered Crown: I was hoping for a Battle keyword. Not that funny, a lot of counters and both location heavy and draw-hate: too narrow for my tastes.
I liked the Time mechanic and think it might be useful even for future quests, even though it sometimes feels a bit out of place, since I think there could be other ways of putting pressure on players. Do not mistake me: I think a game like this lives upon creating a sense of urgency for the players, I completely dislike when I'm being able to bide my time and defeat the encounter deck by waiting it out.
Massing at Osgiliath, Stone of Erech, Battle of Lake-Town: all wonderful scenarios, both flavorful and great gameplay-wise. I think the designers really made a good job with these, and I'm hoping to see more stuff of this quality in the future!
I particularly like SoE for its flavor, while BoLT really feels like a long, tiring, terrible fight against a fearsome enemy. When I finish I feel like "Whoa! Made it!".