I think this may potentially be a question with a really obvious answer:
Do I need to have the "full manual" controls on a flash unit I'm interested in buying?
For all the pictures I currently take, I have the camera in full manual. I'm looking to get a flash for 1) fill light outside, 2) maybe some informal portrait-type stuff, 3) indoor shots of students working on projects in dimly lit areas. My research thus far has led me to see the benefits of the "auto" features of a flash unit, like ETTL. I haven't found anything telling me about what situations I would use the manual controls for, and whether they would be useful for my shooting situations.
I've recently come across some 420ex's at prices I can deal with. Ideally I would just get a 430EX and not have this conversation, but the difference in price is a deciding factor against the 430EX.

