Got Y on the day. Loving it. Been playing for about 23 hours, but only just got to 2nd Gym. Training up my team to level 27.
Using Braixen, Tyrunt, Wartortle, Butterfree, Fletchlings evo (cant recall name yet off top of head) and Pansage.
Loving the online access. Wonder trades are interesting but consist of rubbish at the mo. Unlikely, but hopefully in the future it gets better when people get testing it out of their system.
GTS is much better, but there's still a lot of stuffheads asking either for legendaries or female copies of what they're trading. The filter system is nice, but it could be better. If you could filter out requests for legendaries or specific pokemon it would be much better. Filtering for requests for pokes I have is good, but not always helpful. If I'm looking for alternate starters then people tend to ask for my starters, which I only have one of and I can't breed it without a ditto.
Also, is there any particular reason why almost everyone not wanting a legendary or starter is instead asking for a Scizor?