Manual 5 spd, not so smooth shifting

I drive a 2001 325CI with 147 miles. No problems of any sort. But one thing I would like to address is the rough feeling shifter. It doesn't shift smoothly. It feels a little notchy or clunky. Other than that trans has no problems and runs smooth. I live in Tx and whether its 100deg or 30deg out, it doesn't make a difference.

I've searched the forum for threads explaining possible causes but haven't found any. Does anyone have any idea as to what causes rough shifting and any links as to how to remedy the issue?

P.S. I changed the trans and diff fluid a few moths ago as regular maintenance.