I belong to both Blockbuster online, and Netflix, and I am a big fan of both. I also enjoy going to see movies in movie theaters, but I am spoiled and I usually go to indie cinemas, in the Hollywood/Los Angeles area.
Redbox and its pitiful selection sucks. Blockbuster stores also tend to have a shoddy selection, but I like being able to just exchange my mail rentals for films.
Hollywood video is still the best brick and mortar store for rentals, they always have a great selection, of odd horror, sci-fi, foreign, etc, films.