The only way to get more options is to make them yourself. 🙂
Suppose you are looking for skateboards and hubcaps. You want to price compare and therefore save them separately. So you click on Add to new list, and when you do it says Type a new list name here. Do it.
When you do, your item is saved in your newly created list, accessible from the left column of your My eBay page, and available whenever you want to add anything to a 'watch' list. Just click the arrow beside the phrase Add to Watch list, and you get a drop-down menu of all your lists.
You can move them around, too. If your Watch List gets full (has 200 items in it), you click the box in the top left of the listings you want to move, find the Add to list button, choose your list, then delete the items from Watch.
Easy and fun. 🙂