This could be absolutely anything. Food, music, people, shows, movies, experiences, etc. For me, I would have to say Daft Punk's "Harder, Better, Faster, Stronger" which (obviously) I hated at first. I bough the entire album because I liked the other songs, and somehow, I just started to like it, becoming one of my favorite songs.
There are so many foods I've eventually liked after hating, but there is ONE that will never go away... I hate onions, likely aways will. Mostly just raw onions, I like them sautéed etc. Jazz is a tough one for me too. I really enjoy it but I know there is a history there that I'm woefully ignorant of and I think that can be a really exciting aspect of it for people. BLOB_CASTLE posts a history of jazz series here that has been insightful. You might want to follow it. I'm on my phone or I'd try and find a link.
I promise I"ll get back in on it! My term ends in about a week and a half and I have two large assignments left. After that, it'll be a jazz bonanza.
It's a marathon, not a sprint. Studies first! Good luck BC.
The obvious choice would be food. I grew up hating broccoli, asparagus, and fish. Now I like all of those, although I can only eat so much asparagus. More recently, jazz music. I used to think of it as a very boring genre of music. While I could appreciate certain songs from the past that obviously had a jazz influence, I just couldn't give jazz a chance. I'm currently taking an intro to jazz course online. I expected it to be a relatively fun course, but I never expected to completely fall in love with it. Now, I can see how a lot of the earliest jazz is sensual and wild. When I feel like listening to music, more often than not I just stick a jazz playlist on. My problem, it turns out, is that I was listening to the more mellow jazz and it would make me sleepy. I like that kind too, but I'm so glad I've given it another chance because I get so much enjoyment out of it now.
I recommend this version of Harlem Nocturne. One of my absolute favorite jazz pieces. Though it might not be very wild, it is certainly sensual.
Asparagus, Hip Hop, Folk music, Linux, Beer, Silence. Those are the first things that come to mind. Obviously some of them are less to do with taste and more to do with a learning curve, such as Hip Hop or Linux...you really just have to understand a bit about them on a basic level to begin appreciate them, and then the great thing about them is their depth...you can constantly learn about them and you still only know a tiny bit. Others are simply a matter of tastes changing over time, and it's hard to really qualify why that change happened. That's an interesting list I just made, in terms of categories. I enjoy questions like that.
Rap and hip-hop. There's still a lot of it I don't like, but I appreciate some of the the good stuff now. I credit GTA:SA, and the great music they choose for the in-game car radio stations. Stuff like this (it's kinda weird that I've never seen this video before) :
Living in the south, my in-laws, gin, white wine, ginger, agnosticism, cooking, anise or black licorice (thanks absinthe), beets, non-fiction, time alone.