Organizational practices with Ps files questions

Hi all,

I'm in the process of laying in a lot of groundwork for use in After Effects animations. Character images done in Photoshop with multiple layers, some to be pre composed, nested and time remapped such as in Aahron's lip sync tutorial here. These files will get a lot of use so it's really doing my homework to get them all ready.

I want to avoid confusing Ae with layer names, so before I do a bunch of final images that all use layer names such as "mouth_001", I wanted to see if it's better to name each layer with something unique, never using the same exact string twice. To put it another way, each individual character is it's own file, but they all might have a "mouth_001" and so on as part of their mouth layers. With more than one character in a scene at a time, could there be issues if each one has layers named alike? I know Ps doesn't care if you name multiple layers the same thing, but I want to set these up well now to avoid hassles later.

While I'm at it, I might as well ask if the image sizes I'm setting up are good for what I'm doing. 1920 X 1080 HD to start with, and I tested some images to make sure they could be close up without showing pixels. The average image size in Ps is 2600 X 2400 pixels (4 X 4.5, 600 dpi). A head that nearly fills this frame seems to stand up well to tight close ups in a 1920X1080 comp.

Does any of this sound like I'm setting myself up to learn hard lessons? Any tips would be welcome.