Sorry for the slight bump, but I could not agree with the above more. I hadn't even thought about it the slightest before, but now I'm looking forward to the launch of Pokémon Bank even more. Wonder Trade will be a blast.
I remember the first few days or weeks even of Wonder Trade. They were horrible; countless Scatterbug and other horrible early Pokémon as such. Now, however, my luck's not too shabby. I've just gotten a Shroomish, which I believe can only be obtained by breeding Breloom, which again can only be obtained, via Friend Safari. I remember seeing a good Pokémon on the GTS asking for a Shroomish, but that was a while ago. I'm a rather generous Wonder Trade user myself, I only really hand out Protean Froakies along with all the other starters currently available in the game. Sometimes you get lucky, sometimes you don't. I had one time where the Pokémon I were getting were just great, so I kept at it, sending out the same Pokémon every time. The next day wasn't so lucky, though.