Looking good so far!
Anyways, are you taking requests? :З
For a brief time, yes.
Very very nice!
I really don't think there is any critique I can give...
Other than some consistency with the lines but that's really only needed in a few places.
If you mean my first image, yes it does need some touch-ups, but then again I threw it together really quick for my avatar on here last night.
In the other images, I didn't notice any line consistency issues. I'm usually very thorough.
Very good, though I suggest you keep improving on proportions.
I really like Luna's drawing.
I've only been drawing ponies as of 2 months ago, and my first attempts are worse. I've done more pencil sketches than anything, and I feel I'm getting better. There are still some issues, but I'm not necessarily trying to copy Lauren Faust to a tee. I'm trying to get close enough but still keep it my own. Hope that makes sense.
These are my current sketches of my fiancé and I. I've been working on these constantly and only just got to a scanner today, so I thought I'd go ahead and put them up while I'm at it.
Please note: everyone has their own style. Even when someone works to completely master someone else's look, there will always be minor differences because no two people draw, paint, sing, or write the same way. Even art has a unique fingerprint.