I had three. One was way too textured for me to enjoy and one was completely straight. I liked the latter just fine, but I bumped my cervix one too many times during my "ecstasy spasms." Both were boiled and re-homed with a friend.
The one I kept (my Bent Graduate) is curved, so I can use it in a rocking motion. No ouchies.
I counted plugs as well as dildos, but glass is a great way to go for so many reasons... Just be careful about dropping your beloved toys on a hard floor. I've broken a couple this way and it's a major bummer.