I just stumbled across this thread while Googling for something random involving bikes - so I joined
Like others here, I'm very sorry to hear of the health problems plaguing Sheldon (being no stranger to them myself). The biggest thing I attribute to him is the fact that I'm not the only one who places the brake lever on the other side to everyone else!! In Australia (riding on the left) you often need to indicate with your right arm to turn right - and braking with the left hand while signalling is of course better. Sheldon - thank you for helping me realise I'm not unique in this regard!
The other thing his site has taught is that there is a bike for every purpose; I'm now up to four (much to my mother's chagrin) and thanks to his site I now maintain them myself instead of letting the bike shop have all the fun!
Sheldon certainly is a legend in this area