Well, Thomeiza - of my hotlist of 754 guys, there are 211 (just under 28%) who have returned the compliment. It took me a bit to find out how you guys were calculating that - the advanced search.
Actually, I think it's probably more the fact that I find lots of people attractive for lots of different reasons than anything else.
Sometimes a great smile, a muscular body, an impressive resume, or just an overwhelming sense that someone is a really nice guy provokes me to click the hot button.
When I read an amazing post in the forums - or stumble on a profile of a guy who is admirable for one reason or another - well... that makes a guy "hot" to me, too.
As for why they click me back... I haven't a clue, and I don't dwell on it. I'm just appreciative of it....
Thomeiza, if the guys you click don't return the favor, please don't be concerned about it. Besides, 20 guys is a very small sample in a site with thousands of members.