It's frankly crazy that someone would find a "theme" to be a worthwhile factor in your decision to use a particular casino or not. If that is the extent of your decision making, you better be ready to lose every penny that you put into whichever site you lose. That's fine and I guess there are a small group of people who use such sites purely to relieve some kind of boredom, but it really is a waste of money to be entertained by some flashy graphics and peculiar sounds which are created to reinforce habit building behavior. It is a dangerous path to choose and very few people can afford to be that complacent with money. You'd be much better off analyzing the odds to determine how long your money will last.