I think that the best word to describe your drawings is: CUTE! xD
Now I understand why you gave me that tip: you're experienced with drawings girls, hehe.
They're very beautiful and it seems you also like to draw backgrounds. And I noticed an improvement from the first to the last ones, good job!
As for what you asked...
I also think that writing is very difficult. And I noticed that drawing has become more difficult for me, too. When I started, I used to draw more full body poses, it seemed so natural for me, but then I started paying more attention to proportions, anatomy, I became more "timid", I guess.
I don't draw very freely as I used to (you know, drawing without paying much attention to mistakes). Now, when I'm drawing a finished work (not a sketch), I pay much more attention to a lot of things, spending hours on the same lineart, erasing even the tiniest mistakes that wouldn't even be visible in full view... I think the reason is that I became more perfectionist and also what you mentioned: I don't make it an everyday habit. Sometimes I spend months without drawing because I don't feel inspired or because I'm too lazy to draw decently. So I guess I kinda understand the way you feel =/
I've never tried different methods to change this, but I plan to practice more until things come more naturally for me. One of my problems is lack of inspiration and when it happens, I try to at least redraw some old sketches and improve them. Or turn sketches into linearts (which is quite a mechanic process that don't require too much inspiration). That's how I deal with this problem. But when I don't feel like drawing at all, I don't push myself, because for me, drawing needs to be something pleasurable, specially because I see the fact that I draw as a hobby, only, so when I don't want to draw, I don't force myself because I think the purpose is lost. Maybe if I were aiming to become a pro, I would try harder, but since that's not the case...
Well, that's what I think and do. I hope you can overcome these problems you've been having soon.
Good luck =)