My favourite slots:
70% of the quickspin games. They are jampacked with features and have overall a fairly low volatility. (Right now I'm in love with tiger's glory). Also the beautifull Northern Lights stays in my top.
Divine Fortune is also a game where I come back to often. With the freespins, jackpot game and expanding wilds it has always something to give.
Finally almost every Ygdrasill game is fabulous aswell. They have this huge variety of freespin games for each slot so you won't get bored.