Quick rough sketches done using a pen and 5 minutes to spare.

I think you mis-understood the purpose of this Website a little bit.
If you're an.. artist and want to show your work to people and get critique you may want to put these up on Deviantart or something.
The only critique you'll find here is how well these images work as fap-fuel.

Base +14, sanhen +2, Lulz_Perpetua +4, Ianagiaiz3 +6, hitman_lu +6, warmth +8, Necronomicron +7

Get some decent paper! Even DaVinci would look like cr@p 'scanned' from notebooks with a cell phone.

Base +6, Ianagiaiz3 +6, Necronomicron -7

Pretty good work, generally.
Get some proper paper, use pencil first, and move on to ink and charcoal afterwards.
Put more than five minutes into your work too. I won't deny they're good, so take some pride in your work.

Base +10