My hair isn't fine, but it is wavy/curly and gets weighed down pretty easily. Kinky-Curly Knot Today is very, very light, though, and you could probably use a ton without it weighing you down
I like that it's like and yet provides some moisture without grease. Darcy's Botanicals Daily Leave-in is one I'm trying, and so far, I'd say it doesn't weigh me down, but I'm going to test it longer. Maybe it's one of your stylers? Thick gels, creams, and jellies sometimes give my hair weight.