I might update this when (if?) I get the game, but here's what I've gathered so far:
Pros:
-Mijumaru has grown on me. In fact, I'm getting it as my starter. FizzyStardust's Let's Play on Youtube has kind of influenced me about this.
-Animated sprites!
-Geared toward an older audience. At least from what I've heard.
-Lillipup is the cutest darn thing I've ever seen. And I'm a guy.
-Tons of new type combinations
-No previous Pokemon. I've got to admit, this was a daring move to make, but I think it's a good idea. For example, now I don't have to hear those annoying Zubat, Geodude, and Magikarp cries!
-Triple battles and rotation battles. I hope there are plenty of these in the storyline, because I don't use wifi I lot.
-One fishing rod.
-TMs are reusable, and most HMs aren't required (plus they brought back Dive)
Cons:
-Pokabu's evolutions look like....ugh..I just hate them. I liked it when it was first revealed, and I though it had some good potential for some awesome evos.
-The English names. Zebstrika? Really? That's not fun to say.
-Apparently there's not much to do after the E4. Bummer...I guess I can do some challenge playthroughs
-No previous Pokemon. Yeah I said it was a good idea, but there's some parts I hate about it. Because it means there's no cross-generational evolutions with Gen 5. I want more Eeveelutions!
-No Pokemon following you around.
I have now got Pokemon White, and by far my favorite part is the revamped EXP system makes it actually enjoyable to grind seeing as you will take risks to get a high amount of experience points.
Oh, what did they do to the EXP system? Because I really wish grinding was more fun.