I guess I should've answered this earlier but I didn't see it soooo.
Obviously it's the Doctor. No one else can compare, to me. He's just so great. (And not just Ten, either, but all of him.)
I think it's because a lot of really horrible things happen but he's so full of energy and stuff, even though his sadness can be a bit all-consuming for him at points. He still runs around saving people and doing fun things and making people better when he meets them. When people travel with him they become stronger and more willing to take stands, to try something new, to be curious about things and care about people. He's a disaster magnet, but he always tries to fix things. I just admire how willing he is to keep going after all the crap he's gone through. Even though he's got a huge ego and he can be a jerk and he's so dumb sometimes, I still really adore him.
Yesss, I collect memorabilia! I have three posters of him on my wall right now. (One of Ten and Donna, one of Ten, the Master and Wilf from EoT, and one of Eleven.) And a few New Who novels.
I draw DW fanart sometimes, but it's mostly crap so I never post it anywhere.
I sort of wanna cosplay him sometime, if that counts. I wanna be Raggedy!Eleven from Eleventh Hour! Or Ten. Ten's good. I want his hair.