I would imagine at least 300 probably a lot more. I have about 50 flavours on me right now. You do start to see trends in what you like even if it's things you like to eat or drink it doesn't always go over well i love honey, love chocolate, never tasted a single e liquid I thought did them well. When i started it was all tobacco & fruit because that was all that was offered then some desserts come through but at the time every dessert i tasted was really bad but my forte right now is custard, donuts mainly blueberry and lemon on those 2, a few really sweet tobaccos like liquid amber, soho, ry4, sometimes fruityish mixes like a really sweet watermelon or strawberry but you do get to learn what you like. I haven't ran into a blueberry custard/cheesecake/doughnut type that I haven't liked.