Lately, I keep typing retrun. I guess I've watched The Shining too many times.

For a while, I kept writing my %foo = { blah => 1 }; despite knowing perfectly well that I should be using parentheses. This was noxious because some fonts make it hard to distinguish {} vs <().

Most of my problems seem to be some kind of touch-typing Tourrette's. The bugs change over time, but they seem to consistently be of that type.