10.His politeness

9.The way he is always smiling

8.His go happy mood

7.The cute way he says hi to fans in between verses while he sings

6.The way he jokes around

5.He just seems like a real person

4.He is always watching to make sure he is in step while dancing but he usually isn't [that is cute]

3.His beliefs and how strongly he believes in them

2.The way he closes his eyes when he sings

And the Number one reason..

The cute expressions he makes when he doesn't think the camera can see him [i love those parts]