I've gotten a lot better trying to focus on the eyes when shooting portraits wide-open. The D7000's AF system makes nailing the AF a lot easier than my old D80. I've noticed, however, when shooting wide open with either of my primes (30 mm f/1.4 or 50 mm f/1.8) as well as my 80-200 mm f/2.8 that often only one eye can be in focus. So which one should I go for, the one closest to me? Is there a `rule'/suggestion and if so, what is the explanation? Note that since I'm thinking of available light photography, stopping down isn't an option.