Marcde, you gave me a chuckle, but you're being way too hard on yourself. The important thing is that folks find the right tool for them - sometimes that's OmniFocus, and sometimes it isn't. Besides, experimentation is the basis of most of human achievement!
Furthermore, changing things up from time to time can have benefits - see the
Hawthorne effect - so long as you don't change systems so frequently you never actually get anything done. ;-)
Welcome back, though!