The cool part about this trade is you never stop learning things. Just about the time you think you are getting it down pat, something gets you scratching your head again.
I'm a firm believer that you only get back what you put into things. Once you say good enough... Your adventure is over in that particular endeavor. But.... there are always more adventures to pursue.
Think about arrow building.... a lot of guys get seriously into balancing and blueprinting their arrow shafts and that's a whole trip in itself....That time is well spent too. IMO