All I can say Is WOW those are really nice shots, the colors stand out, the focus is spot on. Cant wait to see more. Glad you like your new camera. The 18-55mm is a very good lens. try the 50-200mm next I think youll like it even more. Heres an example of the 50-200mm.
this is a flower shot I took this past Sunday the camera is a Pentax istDL the lens is the Pentax DA 50-200mm ISO is 200 and I had the zoom to 200mm. I was about 3feet away from the subject. there was no crop except for the camera lens width
Good shooting David