I can't really say that I have a favorite.
I like going fishing for lakers a few times a year. We don't get many flags, but that makes the ones you DO get even more exciting. Usually hit Caspian, Willy and Seymour during the winter. Still hoping for a salmon, rainbow or brown out of one of these, but haven't had any luck with those yet.
I like pike fishing a couple of times a year (limited trips due to ridiculous bait prices). We usually get a ton of flags (we probably chased close to 50 flags last weekend!) and you never know when the next flag will be that giant you've been hoping for. I do like the fact that I can clean 1 pike and have a meal vs cleaning 40-50 perch for the same amount of meat.
I also like fishing for panfish (mostly perch, because I don't know where to find 'seeds or 'gills) because of the action you usually get and my legs don't have to get worn out from chasing flags all day!