This came to me reading during the Fallen Angels thread.
Do you think the smurfs and IFs are boring/vanilla?
Even if I tend to call 'em smurfs I think the Us are maybe one of the most interesting Chapter (maybe not on the TT but definately fluffwise and in the RPG). The smurfs fought the firsrt Hive fleet ever on their own and survived to tell the tale, they own, govern and rule their ver own subsector, they a mostly autonomous from the Imerium, they aren't taxed of tithed by the Imperium either and about 2/3 of all SM are created of their gene-seed.
Maybe you could call some of their successors boring but I don't think the smurfs at all.
Then their is the paradox of the Codex.
It is THE bible of all tactics ever but it's not perfect. If you're a smurf and prove that it's not perfect you get dishonoured and deathoathed and sent to demon-worlds (Yes I speak of Ventris and Pasanius ;-)) but if you survive you're welcome again...
that seems to make no sense but it's the way they are. Pretty tough for vanilla I'd say.
Then the IFs... can it be more Space Knights? I don't mean Knight accidential stranded in space, that would be the BT ;-)
The have their tourmaments of swordsmanship, they are obssessed with their history, they're to stubborn to die, they willingly endure oain until they don't care about it again.
To make it short, I don't think they are vanilla, I think they are paragon
*rant ends*
And the Ultras have the added advantage, compared to the Fists, of not having a nasty inferiority complex...though the Fists are hard, have no doubt...
(okay, it was a question, actually) (And as an aside to you: thanx immensely for your work on the orks and eldar....bloody good stuff, sir, and desperately needed.)

Although as a Crimsonite, I have nothing against Ultras or the IF either. We're still the Emperor's Praetorians though.