SM is not my overall favorite character, but he is certainly my #1 DC character. This is a big change from how I used to think. I was a Bat Fan due to the re-runs of the 60's TV show, and really loved the DK and Year 1, etc.
Something has happened in the last few years though. My eldest daughter adored Superboy. Her love may have started with the Smallville TV show, but as she collected the older SB comics, I felt compelled to read them as well. Then I read the older SM comics, and graduated to the newer stuff with 70's, 80's, and present, etc. There is just something about SM that I cannot quite put my finger on. I think the main reason he is my favorite DC hero now is because I finally realized; if I was a super hero like SM, I would be just like him.
So that small part of myself that I see in Clark, is why I like this character so much.
There are a lot (and I mean A LOT) of people that would be horrible humans if they had SM's powers. I like to think, and believe, that I would be exactly like Clark.