I think a nice diamond stud would look hot as hell. Just do it for yourself. I agree you have to be comfortable wearing it because if you're not people will notice that and it'll be easier for then to crack jokes about you. If you're confident than you shouldn't have anything to worry about. Go for it.
I personally think that when I guy has diamonds studs it's hot. If you really want and it fits your style then I say just go for it. I also agree that you have to be comfortable and confident wearing because if your not people will pick up on it .
I had my ears pierced when I was younger and even though I don't wear one now the holes are still there and nobody says anything about it. But if I wanted to wear one I could. So even if you get them pierced, it's not going to leave a huge hole that people will be saying "eww" over, lol. If you don't look directly at your ear then you won't notice it. I would say go with an earring you consider "functional" vs. "flashy." You know, nothing super huge,lol.
People that usually wear ear piercings are usually people that are scrawny or fat (in my school)and they are trying to look more attractive by having the person look at his face instead of their physical appearance.
If a really muscular guy is wearing earrings then it will focus all of the attention away from the body and on to the face and if you have a nice body might as well show it off.