Personally I have only ever tried commercial examples and have always found them disappointing and unpleasant. Whenever I bought a mixture of assorted beers back from Belgium or France and opened one that was a Saison, I got the "Damn why did I buy one of those again!" moments on the first sip.Saison is an interesting one in that I don’t think their are a huge number of commercial examples it certainly wasn’t dominating the taps in the pub like Sours, and Hazy IPA’s the last time I was in one. Likewise looking at the ‘what are you drinking tonight’ thread on here while their are a lot of Saison drinkers it seems to be very much dominated by home brewed ones far more so than other styles which is part of why I wouldn’t see it as over rated.
As for the popularity amongst home brewers I can only speak for myself Saison has the advantage of typically having a fairly simple grain bill and can be fermented without much regard for temperature control. If you like them (which I personally do) this makes them a great beer for home brewing.
This is why I was so bemused whey i joined this forum and found so many members enthused about Saison. For that reason I find them overrated.