Annoyance...

[eastofeden]

I think you should figure out if you would be OK with him doing what he does or if it is going to be a dealbreaker for you. Everyone probably has some qualities/habits that are going to be annoying so ask yourself do the annoyances outweigh the good stuff? - or maybe the annoyances are way too much to handle no matter how good he rest of it is? OR - what if the bottom line is that he does not change at all? Could you accept that?  

I had a  real quirky involuntary litmus test for guys and I could be totally interested in a guy BUT if he made fun of other people's appearances or droned on about how "hot" this or that person was - my interest went away totally and instantly. Hearing that crap is worse than fingernails on a chalkboard for me. I never told any of them why I stopped being interested - I kinda "ghosted" them before the term "ghost" was  ever used to describe it. 

If I could do it all over again I might have explained but still would not be interested so maybe communication could be the key. Ask him if he can change that habit or if it is not something he is willing to do.