Currently, if you set assets to be reservable directly by clients, the client is shown a dropdown that includes ALL Asset Types and Models. This is true even if the reservable button is selected on the client side or the "Limit to Assigned & Reservable" option is selected in the Asset settings in Setup.
If the list is set to only show reservable items the Asset Types and Models dropdown list options should be limited to options that have reservable items.
This would make it less overwhelming for clients, who aren't presented with a long list of asset types and models when they can only receive items from 3 types and a handful of models