I actually find it cute when a guy texts first. And try not to send too many questions per conversation. Maybe a maximum of 3 or 4 per conversation not counting, "How are you?" Or "What's up?". Also, ya, I know that if I'm annoyed, I'll dry text and stuff.
When it's a guy I like I love it. When it's a guy I don't like I find it super annoying. When I don't text back or text back every hour or so I am usually annoyed lol I feel bad not texting back at all