I'm not going to pretend to you that the photo is anything special, because it's not. It seems to be a very quick snapshot with no great thought behind its taking. As a couple of things to consider then with the shot:
1. There's no clearly defined subject here (is it Bob or the kitchen?)
2. Assuming the subject is Bob, then the background is very cluttered and distracting.
3. Bob is very awkwardly posed and doesn't really look comfortable with being photographed.
4. You've cut a number of limbs off with the framing and in general, crops that happen to be through joints (knees in this case) don't look too good.
5. In general, the built in flash capabilities of cameras do not provide good results - use in desperation only
As it happens, I don't think too much of my own portrait stuff, but the only way to improve is to keep practising. Try studying the portrait photography of others and see if you can identify the key elements of what makes theirs work, then see if you can incorporate that into what you are doing. See if you can get yourself into the mindset of thinking what you want to show people with your photography and work towards achieving that.
More than any of the above though, keep working at it, keep posting for comment, take the best of the comments offered and ignore the rest.