BFB,
Just as an 'excercise' for the last several years I've been tying a few of the 'Fly of the Week' every week that I'm home.
Good 'practise' for a wide range of skills, and it helps fuel the imagination with lots of inovative concepts.
As far as 'standard' patterns go, the best way to learn them is to tie a bunch of them. Tying a dozen dozens will get you up to speed on just about ANY fly. You can just cut the dressing off the hook on the first few dozen if they don't measure up to your standards (the concept is that the last several dozens will be much nicer...).
You'll have to decide where you want to go with fly tying. Just tie the flies that you want to fish, or get into fly tying as it's own form of recreation. Up to you, of course.
Good Luck!
Buddy
It Just Doesn't Matter....