Maybe I'm atypical, but I'm kind of OCD about my inventory and I like to keep things sorted as much as I can. So I usually have one sack for quest items, one for skill books, one for alchemy/cooking tools, etc. I remember a request a while ago to allow renaming of containers, which would be ideal. But if that doesn't happen, then it would be nice to have a few different colors of sacks available in order to tell them apart (black, tan, maroon, etc.). I don't know a lot about game development but this seems like it would be easy to do. You'd just need to play with the hue slider on the current sack icon.
Thoughts?