I haven't read the whole thread yet, but it seems everyone is forgetting about crafting. Especially if you level all crafts to 50, and gathering jobs which includes Fishing. Mats that are needed for crafting take up space, also if you do fishing at all, then you have all the bate to deal with. On top of everything else managing inventory can get to be an issue. Of course taking some time out to look over said inventory and see if you need all the mats should be done periodically but as usual, as soon as you sell off some of it you find you need it.