I'm playing Pokemon Y, by the way, and I'm really enjoying it~ I know they've been trying to freshen up the series, and Pokemon B&W wasn't very successful in my opinion - like, they were good pokemon games, but all the new stuff they added, for the most part, were actually detractors for me? They made things overly complicated and didn't seem to mesh with the game as a whole. Pokemon XY is the complete opposite, they tossed out all the BW stuff and tried again and it's AWESOME. Mini-games that help you make your pokemon stronger in battle, new battle mechanics (mobs! of wild pokemon!) and, most markedly, they completely changed the feel of the game just by making really awesome 'late-game' pokemon available at the beginning - in the first few routes you can get Absol and a lot of the three-stage dragon-types, for example.
The order you get the HMs in is switched around as well, and you don't need a million water HMs any more (which they did do in B&W, to be fair). Mega evolution is also pretty cool; at first I was a bit irritated that you can only get the stones to mega-evolve pretty much all the pokemon until after the 'end' of the game, but the fact is that there are so many really awesome pokemon available in this game that I can only see myself building a mega-evolution team after the end of the game ANYWAYS, which I assume is what they were going for.
I've seen some people say that they found XY too easy compared to past games, but I'm finding kind of the opposite, that I'm having to rework a lot of my strategy to adapt to the change in pace. Usually, I'm the kind of person who NEVER runs from a wild battle, but the abundance of Absol and fucking Miltank in some routes - early routes, with pokemon I was still working on - meant I had to get used to learning when to run from a battle immediately, because the loss in time running back to a pokemon center after a single wild pokemon wiped out a third of my team wouldn't be worth it. And there's a lot more options in terms of creating a strategic team, with all the pokemon available to you right from the beginning, which I LOVE.
And then there's the fact that you can customize your character - including skin color, to some extent - and buy awesome clothing for them, which you know I am enjoying ahhhhhhh
Anyways I'm gonna go play some more now because I have to evolve my team so I can kick dakfire
's butt in a PvP