What if you were constantly being threatened, denigrated or otherwise being made to feel that you're inferior because of your brown hair ? I would applaud you for holding your head up and announce to the bigots " I'm proud of my brown hair, you're the one with the problem". We're around and we're brown; get used to it.
Be proud of your achievements, not your sexuality.
If you've stood up to oppression visited on you because of your sexuality, be proud of that!
But if you believe that your sexuality itself is an accident of birth, being proud of *that* would be conceited. Of course, if you've *become* gay and chosen this lifestyle, well then you could be proud of having made that decision.
There are a lot of people out there who, and I'm sure this will amaze you, couldn't care less about your sexuality. They neither approve nor disapprove; its not our business what you do in the bedroom, its not our business if you kiss your boy/girlfriend in the street. But when you start to harp on about it, this creates a bad atmosphere and actually turns people against you who would otherwise be neutral. Can you believe this??
Be proud of your achievements but don't lay it on with a trowel, you would just be making people sick of hearing about it.