The closest thing to a crush I have, is not a fursona, but merely a character in a comic I'm fan of. I really like his story and personality, and I've long wanted to see my fursona have fun with him.
Here he is: www.deviantart.com: Red
I like many other characters and fursonas, but often it's mainly a visual appeal, as I don't know that much about their personality or background. I wouldn't call those crushes.
I very much enjoy finding pictures of different characters, and coming up with ideas for how they might interact with my own fursona. I do that rather often, on the main site and sometimes when people post their fursona pictures here.