By far my favorite is slots. I like the visuals, the soundtrack, and for me, it's an easy game, sometimes profitable. Since I don't place large bets, when I lose, my loss is small. I can spend hours playing; I put on my headphones and immerse myself in the gambling.
I understand and respect the fact that you choose slot as your favorite game and one you play the most when the three mentioned gambling games are the only ones available, but you have to be aware or know well that slot games isn't and is never profitable if you are a long time player and do play frequently, to be sure or know this, you have to calculate all the monies you've spent playing slot games and on that other hand, calculate how much you've won in total, you will realize that you've spent alot far more than you have won, except you won a jackpot recently and are yet to lose its equivalent.
Slot games can only be sometimes profitable in the short term, this also greatly depends on how lucky the gambler in question is, else, it's still hard to be in profit, loses will always outweigh profits.