blackjack gives the best chances of winning in my opinion and because of that it is most favorite game as it involves some skill not only luck
Off course it need to some skills but at the end if you want to win every time in any kind of games one must be lucky so either gambling or any sports if you play very regularly you will lose some times. But in gambling if you lose regularly then at the end you not have any thing to lose so I don't ever gamble to make a big profits from gambling.
It takes skill but you also need to take into account the probability. Generally its best to play these games in a real casino then online.