Skins are somewhat different though because they are considered a “license” and aren’t a physical item once assigneded to a player.
This is also assuming you activate the skin, but there are times when you would not activate it, such as when you’re planning on selling it or when you have spare because you activated an identical one previously.
You don’t need too many containers. Basically my set up, which is very neat, allows me to filter all my assets and dump everything into the respective containers and then my hangars are clear of everything except the containers themselves. I might have some specialized filters or I’ll create an unsaved search filter on occasion, but not often.
Here is how I organize my assets in my corp, for example:
Notes:
- It’s important to separate compressed from uncompressed/uncompressable raw materials because one is freight-friendly (in terms of ISK/m3) and the other is not. The uncompressed items can always be compressed to be freight-friendly
- The reason I have so many BP containers is because we own more than 1,000 unique (non-duplicate) ME10/TE20 BPOs, so those BPOs and any copies we make from them are stored in those containers. Most players/corps would not have this many BP containers.
- The stockpiles section is the most important part - this is what comprises most hangar junk, and it’s this junk that goes in these containers
- The rare goods section holds a lot of misc. items that gets further sorted here. These containers don’t contain much but it helps find random items that I have low quantities of (eg. faction BPCs, tags, keys, etc)
There are filters some of the I use to help me sort out these things so I know what to dump in these containers (along with a few other filters)

Note that filters are sharable, so if you create a set of filters you can always share them with other chars like alts or corpmates, etc.
After I filter items and store the filtered goods in the respective containers, my hangar is almost empty excpet for items I plan on using at the moment (eg. ship fittings, stuff I’m freighting, etc)