Accumulated bet for me too. I prefer playing longer games than just one single bet and test if I am super lucky. Based on experience, that doesn't happen to me a lot of times, winning in one sweep is always avoiding me. Although I do like single bets in sports gambling I also do parlays but not putting too much money in it. I once had a good win in a long parlay and I can say it was damn satisfying. But, it does take a lot of time analyzing games, stats, and history before I hit that. That's the good part with sports betting, you can increase your chance of winning by doing your own research and also by following the game that you love.
Casino games on the other hand is such a messy game. I've been playing Keno and Plinko and it's like a roller coaster ride, winning and then back to losing like you are being played by the gambling sites' system. One thing I've learned in casino games, is if you play longer (accumulated bet) there's a chance you will hit a multiple win or a chance to lose all your money if it won't happen as early as your balance can accommodate.