Iwill NEVER own a bike over 500cc.
I said that when I wanted a little bike just to get good gas mileage so I got a little CB125. Now I have my 550. And I'm in the middle of a 650 bored out to 674 with porting, hotter cam, bigger carbs, etc. to go in my 550 frame. But it's partially on the roads you ride. I have longer roads with nice turns and little traffic so it fits a more powerful bike. A 350 in NYC could feel like a 900 in Texas. And it also depends who you ride with, if anyone. I ride with buddies who have 1300cc Harleys (not certain on the cc but they're giant). It's all relative.
Edit: Wait, was your wife over your shoulder? Blink twice if she's still there.