My hair is fine and thin and I can't do 2nd day hair ever, it's a mess. If I don't want to re-wet & it's not too tangled, I put it up.

Because its fine & thin it dries really flat if I don't diffuse. I have tried just letting it air dry without too much manipulation but it goes stringy. I don't mind soft & some fluff, I'd rather not have totally flat & stringy. I haven't mastered the wavy look yet but I'm not giving up lol!

My straight haired friend is not Asian & has fine thin hair like me. She has to wash hers every day too. But really, so do I. If I go longer than 36 hrs it gets greasy. Even when I straightened I only did it once a week or so, the other days I just put it up because I didn't want to straighten it every 36 hrs!
fine, thin, normal/(low?) porosity. Mod-CG. Usually I can't co-wash more than 1x a week, & sometimes I have to use T-Gel in rotation due to scalp issues.

Co-wash: VO5 Volumizing
Poo: Giovanni 50:50
RO:TN, Nexxus Youth Renewal, Alba Coconut
PT: gelatin PT, ION EC
Stylers: Giovanni mousse, TIGI Curls Rock amplifier (a-cone), Curls Rock Strong Hold Mousse
Gels: SCC spray gel