I kept FOWLR tanks for 20 years and just got into reef about 8 months ago. The thing is, although I always enjoyed having a FOWLR tank - I never really felt the passion I do now, since taking on corals.
Not to say it has not been without frustrations - not by a LONG shot...but I think the learning curve is a big part of what is holding my interest.
That OR maybe I just needed another hobby to sink thousands of hard earned dollars into and spend hours of time on, only to raise my blood pressure and keep my up at night....I'm a sucker for punishment.