Andrew Nicholson for being so still and balanced. Mark Todd for being one of the nicest human beings on earth. Ian Stark for being the second nicest human being on earth and for having the cohones to ride Murphy Himself to such success.
Least favourite riders are the ones who ride honest horses...
Have a hunt round using the search function and you will find several old threads that might give you a few ideas. My personal favourite is boiled barley (if you have a spare slow cooker).
My mare had a series of 3 Cartrophen injections in the second half of last year. I can't recall the dose each time, but they seem to have made an enormous difference.