It's pretty good art honestly,certainly not terrible and plenty of room for new and even cooler things.
But yeah,this is just going to be my two cents which you can take or leave and people above me probably mentioned things I'll say already but I'm too lazy right now to read through everything,lol.
Anyways,here it goes.
I feel like on some art you tend to take more time and that stuff is what tends to come out crisper,more refined and it stands out compared to other drawings you have in your gallery,trust me this happens with me too and even I notice it and it's just like what greater power possessed me so to do this? Lol.
But yeah,stay away from any blurry brushes namely the spray paint brush or anything that's not say a pencil,marker or pen brush otherwise its very hard on the eyes and often turns into one blob..I know the allure of those soft fluffy brushes,but after time and time again of being 'yelled' at by others online I've gotten away from those finally unless it's something specific in the background.
Proportions,I know they're hard I'm still working on mine and I'm 26 years old..I'd say check for some tutorials or even check out the website Dragoart it's got a mix of cartoony/anime/realistic tutorials to choose from.
Markers,crayons,etc..If you need to use them try and blend as best as you can and don't switch directions because it's obvious I've also been 'yelled' at for that too...Fun fact,you can actually put the watercolor pencils you can get in any old store in water and paint with them.
Doodling is always good it's practice,but unless it's a really nice,clean doodle I wouldn't suggest putting it in your gallery.
If you're going to use pencil,try something new like taking a nice good pen and adding in darker penned parts where you see fit but make it an even mix of both.
Check out a few tutorials on realistic hair,I wouldn't really suggest using realistic hair on cartoony/anime characters unless you really pull it off though with the two art styles which it's possible but yeah,something to work on.
I wouldn't suggest 'line-less' pictures until you refined other stuff,otherwise doing those sorts of pictures can get your proportions really off and it's just really frustrating at times to get everything just right.
Female/Male anatomy,yours certainly isn't bad but it needs a bit of touching up I'm seeing a few strange boobs and such lol.
Try to keep your art more centered and if it doesn't have a background try and play things off properly maybe even add some sort of shadowing so it doesn't look like the character is floating there unless that's what you want,lol.
I mean basically you just need to refine some skills and learn some new ones,I've seen some of your pencil drawings towards the end of your gallery and they're honestly pretty dang good no lie there.
Just remember when it comes to art to take your time,no matter how long that marker takes to color in stuff,no matter how many hairs you need to draw and so on it's the finished piece that matters and you can take as long as you want to make sure it comes out nice and clean.
Never rush yourself because then in the end you start doubting yourself and your skills.
You've got a lot of potential,and never take anyone's compliments as a bad thing it's good to know people appreciate your art and sometimes people just don't know how to give critique or they're not artistically inclined they just know by what they see.
But yeah,that's all I can think of I hope it was of some help to ya.