It depends on the movie. Some movies are definitely better seen with a crowd. I think in general I like mostly empty theaters, mainly because you don't have to put up with noise.
I don't like noise. If you have kids or cell phones, leave them at home. And laser pointers too.
I don't like people putting their feet on the back of my seat.
I do like smuggling food into the theater. I don't like paying $4 for a bag of popcorn. And $3 for a Coke. I think their prices are ridiculous (yes, I know that concessions are where they make their money). Also, smuggling food past theater security feels so.......bad - I like it.
I like theaters that clean between shows.
I like high-back chairs in stadium seating with about a zillion speakers cranked up to their max level.
I like BIG screens. A new theater in our town has great stadium seating, but screens that are smaller than my television.
I like good movies. It seems like too many recent movies suck. If the theater is going to rape me with their ticket prices, I demand that the entertainment is worthwhile.