I came to the 3ds from a vita so I get a lot of what the op is saying. I think the 3ds needs rounder corners because they can get bothersome. But I really love the circle pad. I could never play more than 2 or 3 hours on my psp or vita because analogue and nubs hurt my thumb.
But it's comfortable enough and I look to game systems for their games rather than the extras. And it's got most of the games I'm interested in.