I have racked up 13,226 hours on my main character on FFXI, Depressing to think that's equivalent to well over a year and a half of non-stop play.

Other than FFXI:

I have completed FFIX 5 times, each with playtimes of 80-150hours, couldn't give an exact figure due to long-lost saves but I would imagine it amounts to at least 450 hours in total.

My longest single save file goes to FFX with just over 310 hours.