I have always hated stretching before exercising and new studies are showing there is little, if any, benefit to stretching. Now I do not have to feel so guilty when watching the folks at the gym whose stretching routine sometimes seems to be longer than my entire 30 minute exercise routine.
Actually I do stretch sometimes, but primarily when I am going to be doing exercises involving a lot of jumping — I will stretch and do a quick jog before playing basketball, for example, or else my calf muscles have a habit of tightening up. Also, I usually stretch if I am going to be exercising for a very long time, i.e. an hour or longer. Otherwise, I find stretching too boring.