I might not be any better than you, but I'll do my best to (reasonably) criticize you so you can improve more!

.......is there a certain painting you have in mind or would this just apply to all future paintings until further notice?

Same question as above. I'll take a look and report back with a critique.

Yes, I will try to apply your guys' critiques in my future paintings.

maybe more dynamic poses? you use alot of trippy/psychadelic elements, and poses featuring more movement would combine really well!!

OKAY, Back, to start off, my favorites are by far "Convince Me..." and "Class of twentyeighteen"
I try not to judge on lines, but those two knock everything else outta the ball park with line ability.
Linework: This is important to remember, since threeD hides mistakes, I looked through everything without threeD. The newer part of your gallary looks a bit rushed and too harsh.Even this drawing here is a bit inconsistant. The thick lines look closer yet her hair and jaw look further away. As a general rule I never use black as an outline color.
Color: you have a good eye for color. Be careful about the saturation of your colors [desaturated are closer to gray] Even a fully saturated red will pop out from being next to an desaturated green. Even if that red is on the background is on the layer.
If you ever have any questions, I'll try to draw tutorials of anything, so feel free to ask!

my source: I am a university art studio major student.

The colors, shading, and the visuals are very neat, the only thing that might stand out is the posing and such, but other than that, it's good. :v