Hello ...as a novice I believe have have almost mastered my trusty Nikon D3100 ... and achieved the odd photo which I like even if nobody else does

I have now made the leap of faith and don't tend to shoot in AUTO. I like taking images of most subjects ...landscape, animals, people, buildings ..and have no real desire to focus on any specific style.
I have a few Nikon lenses and so want to stay with Nikon, but my question is where to go next? I was thinking about a D5300/5500 and from a budget perspective thought the D5300 would be a better buy. Then again with Christmas coming along I thought I could treat myself and go D7200.
Every time I sit down and try and decide on a particular model ...I end up changing my mind ...so any advice welcome. I thought I was indecisive ..but now I just don't know
