Of course I play online. It's much more relaxing and safer to gambling online instead of going to a brick and mortar casino. Hell I can gamble in my pajamas and smoke if I want to. I don't have to follow normal casino rules which can be very strict and sometimes the waitresses can be quite rude . 
I never played online casino because I am not regular gambler. I just gamble seldom and for that always use traditional casino. I visit a casino with my friends and we chill for some time and also gamble little bit and come back to home. Addicted gamblers use both online and offline for gambling because they want to earn more and more but in vain.