For some lists, remembering the cards is actually part of the learning curve: when I have constructed a relatively complex rebel synergy squad, planning each turn and remembering to apply all the effects is what I'm supposed to do. I'd consider it a failure on mypart if my opponent had to remind me that because Lando just did a green move, I can put target locks on Dutch and Hobbie, for example.
But if I have something more straightforward in terms of game effects to remember, like, say, a bunch of black squadron pilots with predator, it's a somewhat different matter. Maybe I get caught up in rolling buckets of dice that I forget to apply predator in one case. If my opponent then points that out, I just think he's a nice guy and move on. It's a very subjective thing, but keeping the cards in mind is more 'the point' of the rebel synergy list.
Psychology predicts that most of the time, we attribute wins to our own skill. If you made a Fat Han list and win with it, you're probably not going attribute that win to the fact that your opponent reminded you of C3PO once or twice, but to your preparation and to your skill in keeping Han alive up to the end. And that psychological mechanism is generally a good thing, I would say. There's nothing gained by considering yourself to be a weak player every time your opponent helps you slightly just because he's trying to be friendly or a good sport.
In another thread, someone said something to the effect of "tournaments aren't fun, I play them for bragging rights." This suggests that bragging rights, or strengthening your ego, is for some a basic need like food, air or money. In some way that holds true for all of us. I think it is smart not to put yourself in a position where you're cut off from that need too easily.
