Waistbands in shorts don't cut into my waist either (my favourite ones rest on my hipbones), and for everyday use I'm happiest in regular shorts. I did buy a pair of bibs after hearing everyone rave about them, and for longer rides when I'll need to eat - and digest - on bike, they're a tad more comfortable. It's not a big difference to me, but I get HUNGRY, and digesting food with a semi-high HR while hunched over isn't the best position so the lack of waistband helps a little. They're also a little more comfortable on those days when you're retaining water and suddenly a size larger than the day before...

But for 90 % of my rides being able to whip off my shorts fast to pee is a lot more important.