I'd challenge friends but I'm a bit better than them so I win often and they stop playing :l
My favorite aspect of Pokemon? Idk, it's been a long time (been playing since I was five years old). It's probably a mix of everything: the Pokemon designs, the competitive play, the story. I guess the best thing is that I get to customize my team of Pokemon in whatever way I want, and I can play with Pokemon any way I want. Like, I can do contests, battles, or breed them. Idk if that makes sense XD
What's yours?