Rejoice in thy youth if you tie. The more magnification I have to add to see to tie, the less I like doing it. At this point, if I could trade my materials and tools for flies, I would. I frankly think I would have a better fly selection if I bought them instead of tying my own. Ten years ago I would have said the opposite. That is not just because of deteriorating eyesight. There are so many great tiers doing custom work, easily accessible on the internet, that shopping for flies is very reasonble in terms of price, variety and even turnaround time to get them.
Now some doubletalk. I still think it is a good idea to learn how to tie and do at least some tying, even if you will mostly buy flies. Chances are you will come up with at least a few patterns that you tie very well, and that you use to catch fish. There does seem to be some extra satisfaction to catch on what you tied vs. what you bought, though certainly you can enjoy flyfishing without tying, and some who don't tie are better fishermen than many of us who do.
Now for some tripletalk. My tying picks up quite a bit during the cold of winter, and besides just filling some holes in the flybox, I pretend to search for the holy grail in tying material with that mystical, magical property that a fussy trout can't refuse. For example, I have never dubbed with real seal's fur (I am aware of the seal's fur substitutes), which as a material seems to be esteemed in the UK in the same manner that sparkle yarn is in the U.S.
Of course there's no such thing as a holy grail in tying. Or is there?