Yes, those are pictures you are going to enjoy for years.
A couple things...
. See how the DA 50 with its faster aperture is capable of isolating the subject better from the background? The first shot, being in a smaller aperture, ends up looking "busy" in the background. And sometimes, when the background is beautiful, that's what you want. But not when it's just a heap
. On the 2nd picture especially, I would try and put her slightly off center. That is one thing that makes a picture look more like a snapshot than a pro shot - when the subject is dead centered. There are exceptions, of course, and the first picture you posted at the beginning of this thread is one. In that picture, she made it look artistic by choosing an angled background that had lines and repetitive patterns. There's a lot of articles online on the subject of "rules of composition" - that's another thing to study. Don't get too hung up on them, but they are good to know.
. There's a lot of discussion about whether one should shoot raw or not. With new cameras, the jpeg engines are quite good. But with my K20D (which is the same generation as your K200D), I find that the jpeg engine isn't that great. So I shoot raw - even if I don't do anything else, my software does a better job of converting from raw to jpeg than the K20D does. The colors look more natural, contrast is better, etc. It even does a better job guessing the white balance. Plus - I can select an entire directory and right click and just choose "Export to JPG" on my software, hopefully yours also has that option. But usually I'll go through the pictures and pick the ones I want and do at least level adjustments.
. Finally, the 2nd shot seems underexposed. Most softwares have a one-click level adjustment feature that would take care of that in an instant.
I hope you don't mind me doing a little of PP work just to show you small changes can make a big difference. I didn't do a whole lot because I used your small jpg that you posted as the base. Mainly level adjustment, some selective sharpening, bringing the eyes out a bit, getting rid of some yellows in the face, and getting rid of one strand of hair that was sticking out too much. And cropping to 4x3 to get her off center a bit. Working with a full size raw file would yield much better results, but this will give you an idea, maybe... of course that's just my style of editing, you could be looking for something totally different...