I have a bmx bike, its cool and shit. I'm much more comfy turning at high speeds on that this then on a mountain bike which I'd probably eat shit on. But on Mountain bikes I can go like 100 mph and it won't even hurt and I wouldn't have to stand up. And with a beach crusher you can crush comfy but you don't get as much speed, you don't have shocks, and you can't ride down a couple stairs instead of getting off.
P.S. I want a new bike kinda.