Personally i find Slots addicting that's why i do not want to play a lot of it, but i didn't stop me from making profit from it but my profit came most likely from playing free spins also its more based on luck other then that i prefer playing roulette because its not based only on luck there is following the numbers and statistics .
Having a big bankroll is great to make some profit if you put your mind in it you can be accumulating profit bit by bit but lit leaves you with the question when are you going to stop before lose it all.
Moving to Sports betting i really love it too but i think most of my losses came from there.
Roullette, dice, slots, no matter what you are playing if it has a house edge that is the chance you will win and its all based on luck.
Roullette is no more strategy than slots, sure slots is just clicking on button most of the time and that's it, but in roulette no matter what strategy you do, as long as you are betting against the house edge you will always lose in the long run without exception. That is why I do not really care about what game it is when it comes to profit, I do not gamble for profit I just gamble for fun and that means I can play in any game I want.
I like slots because it is relaxing, it lifts all the responsibility from your shoulders and just makes you relax and click buttons and watch them all spin and it is very simple enjoyment. I know I will always lose my money there, I just like doing it and gamble very little so I do not end up losing much, just a bit, and that tiny amount I lose is not that important, the fun I get totally worths it.