Kinda nice pics, although I tend to have more interest in guys that post up less 'posed' photos and more natural photos and then if getting sent more, in a number of different places or outfits, if they are all the same place in the same outfit then my mind begins to doubt if they are from the guy i'm messaging.
Don't send the butt pics, unless you're specifically asked for it, I mean you don't wanna give all the goods away too soon. If its on Grindr, then I guess 80% are time wasters wanting wank bank pics! Also, on Grindr be as blunt as possible with what you want, like 'looking to fuck a juicy ass right now' I hate it when I message a guy with an interesting if slightly vague profile and find he's just there for the chat and isn't clear what he wants or what he doesn't want.
I'm not sure about the race issue that people are bringing up, I've not really experienced it in that way. I'm a white guy and do like a bit of variety in my sexual partners. I mean I don't just read one book over and over again or watch just the one tv show over and over or eat just carrots for every meal on every day. Variety is a wonderful thing, make the most of it before it's too late.