My wife is more concerned about the beer belly and whether I have a haircut than what colour my hair with. When it comes to her, as long as she's happy with how she looks, I couldn't be happier. If it comes to her telling me she won't find me attractive unless I dye my hair, then I'd be surprised as that's not the attitude of the person I married and I think we'd have more serious things to discuss than just my grey.
And yes, my mates would ripe the piss out of me if I did dye my hair, as would my colleagues and family, mostly because, again, it's not in my personality to do something like that and they'd wonder what the hell had happened to me.
CG – If you're happiest with colouring your hair that's all good. However what happened if a bloke you met wanted you to let it grow out as he didn't like that look? 🙂