Mind if I do them in reverse order?
I generally don't really get into being the ler in a more intense scene, but don't mind it when it's simply a playful tickle fight or goofing around. There are a few (very few) people I wouldn't mind getting into that with. But, as a rule, it simply doesn't interest me.
While I do enjoy a good laugh, that's actually one of my least favorite parts about being tickled. Since I have asthma, it's tough to get out of breath and still be able to enjoy it. So, I'm not anxious to start laughing...and generally don't laugh a whole lot. I react in other ways, though.
Now, as for what I like about being a lee. First off, I love the sensations themselves. That can change for brief moments when it's really intense...though I kinda like that part too! lol But, that leads to another aspect I like....being totally out of control and helpless. For most of my life, I've been a total control freak. The one area I can allow myself to give that up is when I'm tickled....but only when it's by friends I trust. Even with them, it takes me a bit to really let go. But, it's worth it! I also like the rush from the whole thing....both on a physical and emotional level. Though it can be physically exhausting, it's also very much an invigorating experience that fills me with energy well beyond the short period of exhaustion that can follow.