Judging by the statistics of the survey forum members believe that all the same slots are more profitable compared to other gambling games. I wonder why OP did not add a lottery option to the poll?
I mean technically the games that give you the best chance to win big or card games. Games that take skill, that aren't manipulated by the casino (slots, for example are something we all know are manipulated). If you're good at the table games, then you've got a better chance of winning big versus playing something like a slot machine which is a complete gamble.
How do you know that slots are manipulated? I always thought that if in gambling and there are manipulations, it is almost impossible to prove them.