Im mostly excited for EXP for catching pokemon, and for some reason Only mega Evos for past Gens, which both confirms that one, it would be cruel fate if they never made Mega Evos again because then their own gen wouldn't have any, and two there is even more mega evos and they are all from the 650 so more likely for our past favorites to get them than our new favorites coming with XY.
Also the anime looks awesome! I like the new designs for joy and jenny, although I hope Team Rocket doesn't go back to being bumbling fools again, I mean they kind of are for nostalgia reasons but it was really cool how awesome and actually proffesional they were in BW and I hope they bring that back. And if there one complaint agree with with BW its that yes, my memories of it look a little more Flash/Illustrator more so than Photoshop, if you know what I mean...
now for details, little sis is matchmaking, I expect awkward cuteness everywhere now, also Aipom arm=win, also Ash is secret childhood crush potentially for serena, the Plot thickens!!!
Its also pretty obvious Ash and froakie have a connection going on, which makes me happy.