Would you care what denomination of church you attended?

We have 26 churches in this town of 12,000 people. There are churches everywhere! I used to be a church goer. If I had to pick a new church I think I would avoid Catholic churches (too much pomp and more superstition than average, what with the chants and rigid rituals,) and I would avoid a Baptist church (too inflexible and fire and brimstone.) I wouldn’t go to a Jehova’s Witness church, either because they’re annoying as hell. But other than that I really wouldn’t care what denomination I went to, as long as I liked the people.

As a second question, why are some people insistent on what kind of church they attend, and why do they look down on people of other denominations?