Originally Posted by percontator
No other airforce (except USMC for its air capable assault ships) which has expressed an interest in JSF is opting for the F35B. So a major reason for choosing STOVL seems to be the "jointness" of the requirement.
Italy, Spain. They choose to replace their AV-8B+ Harriers with F-35Bs, with Italy going with F-35As & Typhoon for their land-based needs, and Spain currently committed to Typhoon for their Air Force (but there is talk of possible joint purchasing arrangements).