Have you ever even tried anything larger than a 23c? I'm guessing you haven't. Fatter tires are defintiely more comfortable even on moderately rough roads. Sure you can easily do 100 miles on 23's and do it faster than you probably would on 32's (obviously). But once you've used both there's no question that the fatter tires are more comfortable. Even if you're not riding Paris-Roubaix. That's a fact. Plus if you do any curb-hops, off-road short-cuts, gravel roads or anything like that on your commute, 23's (or even 25's or 27's) aren't exactly ideal. Tires more than anything else determine where you can and can't go on your bike.