I'm pretty limited in what I shoot. As a consequence I've gotten quite bored and haven't really shot anything in awhile and am having trouble motivating myself to photograph something. I usually photograph parts of objects. I isolate sections or pieces of a whole object and showcase them because I think they're often forgotten in everyday life. Things like knobs and switches, dials, or the badges on a car. Like I said, though, I've gotten bored of this recently and so I think I might be well served by branching out.
I've shot a variety of subjects and genres in the past and wasn't really taken with them, to be honest. The only subject I haven't really tried was portraiture, fashion, street, and sports, but I'm not really sure if I'd be comfortable taking pictures of people. It might sound silly, but part of my comfort with objects comes from their inability to complain, judge, no-show, move unexpectedly, and so many other things that can make people a hassle to photograph.
Which isn't to say I don't enjoy photographs with people in them, I do. I find that when I look at pictures from other people I'm most often drawn to the 'people pictures' and they generate the most emotion from me.
Any suggestions, or other advice?

Maybe try doing some HDR shots. 
