>For woodwinds, even a retarded person can become expert on the oboe.
Sorry to pounce on just one line of your post about hobbies, but the above is patently untrue. The oboe is probably the single most difficult wind instrument to master or even play passably. Most people who picked up a saxophone or clarinet, for instance, would be able to instantly get some sound out of them however out of tune it might be. Those same people would likely be unable to get the slightest peep out of an oboe, it's alto cousin the English horn or a bassoon. Double reeds require the development of extremely strong jaw muscles to create the right embouchure and generate sufficient pressure on the reed. It's the absolute worst instrument to suggest taking up on a casual hobby basis. They're very expensive instruments, even student models, and you virtually have to make your own reeds. The recorder is a much better choice. They're difficult to master but easy to pick up the fundamentals on and if you skip over the ubiquitous soprano models for a slightly more expensive alto or tenor, they're capable of of very rich sonorities. If it must be a reed then make it a single reed instrument, and alto or tenor sax is easier than clarinet to get clean notes out of, especially in their lower ranges.