It entirely depends on what I'm craving in the moment, but sweet, salty and savoury/umami have always been my go-tos. I also like sour (candy). The only one I'm not big on is bitter, unless it's something bittersweet.
Hard choice, but I went with Umami. Salty would be probably be in second place, but those two go so well together imo :9 Third is probably sweet, and I have a huge sweet tooth so the top 3 are very close haha. I like sour candies a lot, so sour comes in at number 4. Bitter is the only flavor I never like so it comes dead last. I genuinely can’t comprehend how anyone likes it, but you do you XD