CRITIQUE MODE ENGAGED
I asked because on your first two I could tell. They were a little
too correct compared to your sketches of MM and Roll down there. I had a similar start myself, just drawing anime characters and whatever I could way back in high school. Things I wish I had been told then:
Don't draw anime characters if you want to learn.
Do try drawing from life and draw real people or attempt to copy pictures of real people. Cartoons are simplified drawings of real life.
Take this for example. It's a small horse, but we can see that this guy knows how and where his bones and muscles go, and because of that, the end result looks like everything fits in the right place.
Attempt to draw spaces for these characters to stand. The void is nice for just doodling and so on, but if you can draw a simple plane (Just a square in perspective) and then put your character in it, you're in better shape than most. Now that I take another look at it, your Megaman.exe actually looks like his left foot is behind his right which i know is off because I probably have
the one you used in front of me.
This is crazy and way more complex than you need, but if you just drew a single square for where his feet should go (where they're touching the floor), you'd have an easier time getting him to not 'float' in places he shouldn't.
Now if you
really want to get into art, I recommend
this. I'm waaaay too damn impatient for it, but if you can stick to it for just a week, you'll see the improvements immediately. I used Draw a box for maybe a week and a half and I could already tell that doing the practice was worth it, even if I couldn't keep up the drive to keep going. I can tell that you're just starting/have a passing interest in this, so if you don't think you'll stick with it for very long, the straight line practice will go so far as to improve your hand writing without too much time put into it.
Final note: Art is like going to the gym. If you decide you want to take it seriously,
never try to compare yourself to others. You can work out all you want in a week, but nothing is going to catch you up to the 400 pound body builder who's been lifting for years that fast. You've got at least a decent eye here since I can see you tried to add things you knew belonged to your drawings but weren't in your reference.
If you want I can point out what exactly isn't working in these, or throw some references at you to look at while you try and draw, be it people or animals. (specifically horses/
some of the TFH animals though, I've got quite a collection there.)
Never stop drawing. You can only improve.