I'll make a brief list of Solo Friendly content from FFXI:
FoV/Garrison
Farming - 100's a things to farm (Small ingredients, trigs for NMs (ie Alky, Pallas, etc), pricey items (Iolite from Corses)etc
NM Hunting
Quest's - City Quests, random side quests, etc
Exploration... I did this alot. Pretty zones!
There was so much more.. but even with the small list above there was so much to keep one occupied, and having fun for hours upon hours.
There is literally nothing fun to do in FFXIV that will keep me stationed for more than 30 mins.