I've watched a couple of videos recently where the shaver held his blade at what appeared to be more than a 30 degree angle (45, maybe even a little more). No visible carnage ensued, so I thought I would venture beyond the conventional limit (out to about 40), WTG, XTG, ATG.
Pluses: Closer shave. Less skipping and tugging in the difficult areas. Little, if any, touch-up required
Minuses: None I can detect. If anything, fewer weepers (in fact, I don't think I've gotten any over the past week). No increase in irritation.
I'm not recommending this! It may be a bad idea for some, if not most. I know there are guys who can't do ATG even with shallow angles. JUst wondering how many others find this an effective technique.