I clicked all three. It's a combination for me. Mostly, it depends on the person, though. Sometimes I may think, "Well, they seem impressed and just want to feel it, so I'm flattered..but I'm annoyed because I wish they'd ask before they just stick their fingers in my hair..." Other times I may not care because I know who it is, I know they mean no harm, and I know they practice good hygiene and aren't going to stick dirty hands in my hair. Basically, certain friends know I may snap if they do. Then there are the people I know are just digging to find something snarky to say and there is no combination. I'm flat out annoyed and will express as much.