In general, these are mechanically good. Focus is good, DoF is what it is with a cell camera, and you're making good choices with your subject and background. The one thing I would comment on mechanically is that in the first image you needed more light. It's a little flat and dark without some flash in it.
I do not mean to be negative with the rest of my comment. Please take it is constructive critique and not me trashing your photos. I do really think they're good for what they are and what you are working with.
In terms of subject, they're great as snapshots. None of them really have any drama or intensity that makes them awesome photographs. What I mean by that is a snapshot sits on your desk, goes in a photo album, hangs with the family portraits, etc... A great photograph is one you walk by and immediately go "I want that hanging on my wall at home!"
These are snapshots. They've got meaning and importance to you, and you should feel good about them. Taking great snaps and progressing to creating amazing photos is the journey we're all on. Welcome aboard.