I find it interesting the way that my photo processing tends to enter into patterns. For a while, I'll enter into a trend where I have a particular look that I enjoy and then I look back and notice that many of the photos I processed end up with a similar look. Oftentimes it will change subtly over time (frequently as I get better with whatever processing technique I'm enamored with at the moment), but there is still a very noticeable thread.
I haven't decided yet whether I think it's a good thing or a bad thing or maybe just a neutral part of my development as a photographer. There's certainly an element of finding my voice which comes into play during post-processing especially. One particularly enjoyable aspect of delving back into my past photos has been seeing which pieces of my style remain similar and which evolve.
One style that I used to not use very often at all is more heavily editing to reinforce a particular mood. Some of my first experiments with that were earlier this year when I was working with some of my photos from Point Reyes Lighthouse. I really like the way that desaturating a photo complements what happens when you're looking out into fog.