Hobbies other than Audiophiliac?

Depends on if you're riding flat roads, hilly roads, in town with traffic lights, or
on country roads with no lights or stop signs.

In the flats, and with half the ride in city streets with stop lights, I average about
19 mph. With hills in the mix, my average drops to 17 mph.

I think anyone riding 25 miles in an hour should consider turning pro.

Golf, skiing, hiking, sports cars.

Walking, amature dramatics, seeing the kids, travel and heres one you colonials can't enjoy, watching cricket. I have tried to explain it to you guys, but you can't really. International Test Matches last 5 days and end in a draw about 30% of the time. That goes down really well " 5 days and it ends in a draw!" You are an impatient people.
Just think, if you were still part of the Empire, you could be playing cricket, not baseball, there's a thought.

have done weightlifting, running, mountain biking (fun), surfing (lots of fun), but have found playing the guitar (now for 2 months) has made me even more of an audiophile.

turning the system real loud and playing along is more fun as any listening session can be IMHO.

Collecting Japanese bamboo baskets (may not sound like an art form but believe me it is) - mostly artists from the first and second quarters of the 20th century rather than contemporary artists - and as of very recently, rebuilding/restoring a Taisho period 'kominka'.