I'm a wimpy gambler.. and I don't like to lose.. so I don't bet enough to win big, usually..
I take my little $20 and if I win $30, I put the $20 back in my pocket.. play my $10 and leave.
My husband does a lot better in the casino, though..
He plays "Let it Ride" on every ship we go on, and always does well. I'm not sure of the skill level.. but he always yells about how "some dealers are better than others" and if he's losing, he has to walk away.
I know when we were on our Mexico cruise in February.. he was doing so well, the casino manager came and stood behind him for awhile.. and asked him a bunch of questions.
That was kind of nervewracking!