People who fancy gandalf want to be the person on the arm of the person who is the life and soul of every room they’re in. They’re absolutely devoted to him, but also terrified he’s cheating on them
Not sure anyone fancies a single hobbit, but probably some people are greedy and would like to be the centre of a frodo/sam/merry/pippin polycule, or at least an orgy
Gimli is for people who drink a lot and “value humour over looks”, or bottoms
Elrond is for people who want to live a 24/7 DDLG dynamic