Horses when you don't allow yourself to use fast travel and you have Convenient Horses installed are actually very useful. Much faster than I can sprint and they can carry an awful lot of items around meaning less time I have to spend trecking back to town to restock on supplies and sell of unneeded items. I'm currently on Solesteim and I miss my horse a great deal if only for the pack mule feature. Teldryn is undoubtedly getting rather annoyed with me by now for all the times I've asked him to carry something.