I wondered if this was a rhetorical question, but I'll answer it anyway. Firstly, I would say if you think Nadal is all power and physicality and no finesse, you have not been watching him play, or you're watching with prejudiced goggles on. He has a fantastic drop shot, both at the net and from far behind it. I'd say it is better than Novak's and comparable with Roger's. His drop shot from the baseline is the best, bar none. He doesn't get enough credit for his soft hands at the net, net play, or his drop shots. That's just true.
Secondly, I don't have a problem with players that make noise when they play. I never have. I think that anyone who has played sports understands that the expulsion of air with noise is helpful to energy and effort. If you don't like it, you can turn the sound down on your TV. As to Nadal's ticks, likewise they have never bothered me. I don't find it "neurotic." I see them as what he uses to focus himself, and let's face it, he's the mentally toughest player out there, no question. People complain that he plays slow, and he does, but I don't think that that kind of mental discipline comes out of nowhere. Great focus takes time.
As to my fandom, no, not for one reason. Primarily, I've always found his game to be thrilling. He hits shots no one else can hit. He bends the ball like no one. And I love the fact that he never gives up on a point, a game or a set. You may find that "workman-like" and denigrate it, but I think it's admirable. One of my favorite quotes about him is from Connors, who was also considered one of the toughest players on tour: he said that "Rafa plays like he's broke." You don't have to admire that, but I do.