At least 25 times. Not out of compulsiveness, or trying to set a record or impress anyone. Like others have noted, it's always a good test of fitness. It's close by (relative for the Sierra) to Los Angeles, and there is something magical about the top, even with all the people. I finally did the MR and I don't think I'll do the standard route as a day hike again.
Last time to the summit was on the last day of doing the High Sierra Trail. I never realized how miserable on the knees and ankles the trail down from the switchbacks to around Mirror Lake is!
