My "original" line of thought was . . . 'why pay the extra money for a room that you'll probably only sleep and shower in?'. So, our first couple of trips were stays in value resorts and we were pretty happy.
THEN, we stayed at POR. With that stay we decided, and not because of wi-fi and fridge, but more because of amenities and things to do at the resort, we would never go back to value. The expense isn't that significant to us for the "value" you get at a moderate resort for what you pay.
No more value resorts for us, but we will ALWAYS stay on site - there really is no reason not to. Bring on the themed pools, fishing, boating, biking & wagon rides etc.!! We're hooked!