I have 23k pics in my library. Never used the Faces feature before but considering it after wasting too much time looking for pics of people. Anyway was wondering if anyone has tried to got back and tag faces for such a large number of pics. Worth it? I'm slowly going back and trying to add geotags to pics that don't have them, which has been interesting. Also does adding Faces info make the library size increase by a lot? (BTW I do have Aperture on my laptop but rarely use it. Any reason why I should/should not be making Face tags or geotags in Aperture instead of iPhoto? Same library, right?) Thanks!