For my videos, I only pick based on LOOKS, I DON'T consider AGE at all. Also, I specifically choose pictures where I think the person looks more like the character I see them as, so it's all about IMAGE for me, I don't care how they act or if they're even actors or what they're voice sounds like, in your imagination you can make anyone sound the way you want. So just thought I should clear that up.
Also, I don't watch other peoples videos when I am making mine. But I do watch them after :)