It's Merry because I took a minute to imagine myself hanging out with each hobbit listed one by one.
Frodo: I will take the Ring to Mordor.
Me: And I was proud of myself for graduating high school... he saved the world. Immediately makes me feel life I've done nothing of import, self-esteem plummets. He's great and all, but his level is unobtainable for me and I'm not sure I'm a big enough person to "like him as a person" despite it.
Pippen: *splashes water all over the floor*
Me: Please tell me you plan on cleaning that up. Though I like him a lot, his energy and immaturity (pre-ending) would annoy me in RL.
Bilbo: I'm not sure... he reminds me too much of my grandfather (in a good way), but that means that I respect him more than I "like" him.
Sam: Too selfless, much like Frodo.
Merry: He just seems so normal. He's very clever (getting Sam to spy, friends with Maggot, etc), very brave (Witch King), very loving (Theoden, Frodo), and has a sense of humor. He's accomplished, smart, but he's just a normal guy, and that's cool.
I'd have preferred the Gaffer, but I'll just blame Fordim for that one.