The main thing is that it's fun, yes the odds may favour the house but the chance of landing a huge jackpot will always drive the passion for casinos, whether online or not.
Have you tried PlayOJO? They do free spins on their wheel. I've seen them advertised on British tv a fair bit. I also use Sky Vegas, some decent games there.
I love this post, I always play roulette on a friday and it seems very successful (most of the time...) haha.
I just read this article on the world's best casinos, including Vegas. I thought it might interest some of you so I'm sharing
http://www.itravelnet.com/travel-blog/the-worlds-most-beautiful-casinos/