I was on propecia for about 8 months. Watery semen, fine, memory issues(maayyyyybe not even related to it), libido decrease... fine. I read that this is normal and people deal with it a lot, or at least it's the most common side effect. Then i started to get fatter, with no change in diet. Then, my semen, being so watery, would cause pain ejaculating because of the dispersed "globs" of semen that werent as watery as the rest. It's been almost 2 months since I quit and my libido is back, semen is normal(doesn't hurt either), and I'm never taking this pill again.
I also never, ever noticed a decrease in shedding, I only noticed the increase which apparently means it's working, but if i didn't give the hair a chance to grow back or whatever I really don't care at this point. I'd rather be bald than have a broken dick and have it hurt when I have sex.
My two cents.