Busy.
I snow ski 20+ days a year and that involves 7 - 8 Race days, plus Race Clinics on 5 weekends. Also two more weekends for Championships (Nor Cal and Far West) so that ties up about 7 weekends (8 this year due to reschedules). In addition I go on one ski week which consumes 2 more weekends. Then there is the Far West Ski Convention one weekend in June. One more weekend for Far West Summer Rules Meeting, and one more for USSA Race Official Training, and at least one for Open League Summer Meeting. I might go skiing "just for fun" one weekend a year. That consumes about 15 weekends a year for skiing related things.
I try to waterski/wakeboard another 6+. That is another 3 - 5 weekends a year at least. The Waterski season kick-off party raises that one more.
Family obligations dictate at least 6 weekends a year for holidays, birthdays, Mother's day etc. Holiday parties for work and clubs might add another one.
Halloween is the most important time of year for me, and that consumes 3 weekends a year with parties, not counting the time necessary for building costumes.
There are other activities done with the various clubs like backpacking, hiking, cycling, sailing, Surfing, kayaking or whitewater rafting. This weekend is a "work weekend" at the cabin at Lake Tahoe. That usually keeps me busy for 3 - 7 weekends a year.
Occasionally I need to mow the lawns, pull the weeds etc. Forget washing any cars.
I try to do a couple dive trips a year, so that ties up 1 - 3 weekends, plus I don't generally dive 3 days before or after a trip, so that means 3 - 6 weekends. I also dive at least a couple weekend days a year.
That ties uproughly 35 - 44 weekends a year, not counting dates or working weekends for urgent projects.
Gee, I guess you are right, I have no excuse for not diving more.
Wristshot