What are your favorite Fields of Math?

Tried to make a post but it got caught by automod, there's this list of "Math Subjects Classification" that might come up on a search engine if you look for it, it lists all the different kinds of math

I must admit I've always liked math but there was a big gap between "I can do this but I have no practical use for it" and my interest in subjects, so I have derailed a bit in my journey of learning math

I guess I'd like to study more category theory... I really like a variety of different math subjects personally