On balance I think I prefer ultra realistic ones for pegging because I kind of miss the real thing... But for use on her she prefers the 'realistic' or not even realistic ones. Depends what we're doing with them really, if it was for display purposes I'd go for a crazy shaped and coloured glass one, so of those are beautiful!
I'm all about non-realistic looking dildos. It's definitely a reflection of the fact that I don't enjoy the real real thing anyway haha, so "realistic" it is. I'm also just attracted to fun colors and pretty designs.