I can tell you what gets me to ignore a message. Guys that say "Hey sweetie/baby/honey/sexy!" That's a surefire way to make me just toss the message and move on.

What gets me TO respond is a guy whose picture isn't obviously fake (aka a glam shot of a male model looking guy in a studio of some sort). I like a guy who's not posting a selfie flexing in the bathroom mirror without a shirt on (that's usually a good sign that they are not only rather vain, but just looking for a quick hook-up for the night and nothing serious). I'd rather they just be smiling happily and maybe holding a cute dog or something (I am a sucker for a guy with a cute, soft and cuddly pet). However, the number one reason I respond to messages is because I am physically attracted to him and our personalities are similar.

I prefer the geeky/nerdy type, as I am like that myself. I also am liberal when it comes to politics and beliefs, so I obviously look for that in any guy who messages me. I can't imagine it would work if our beliefs were radically different.

Anyways, I hope I helped clarify things somewhat for you. Good luck!