Slots generally have larger house edge that makes winning through slots more difficult. They might be fun to play and the animation could make it feel you're playing longer on same money. So, it's not a bad thing if you are for that sort of fun.
Sports betting could be the only skill based gambling where analysis of past and present conditions might bring you a predictable profit. As the games are a few everyday and you are not betting on all of them, the amount you lose or win could be limited. And it's more waiting than actually watching.
Of quick and low house edge game, I generally go with crash and roulette, both of them have a short animation and a house edge same as that of dice.