I was starting to like supporting in S2 and initially with S3 I thought it was just great. The increase to the cost of Crystalline Flask was annoying and I felt that the increase to the cost of Sighstone was a step backwards but even so I'm mostly fine with it. If I knew I could have that role with 100% certainty I would play a ton more ranked games. Having your ADC exit laning phase ahead and then providing vision to aid in the taking of objectives mid and late game is big, big stuff. It also is a role that lets me benefit from being clever or by properly reading my opponent without getting punished too hard for not having very good mechanical skill. I can look at the minimap more and convey that info to someone in lane that very well might not have seen the enemy jungle start to move in or didn't see mid transitioning top or whatever. You get more opportunities to notice how a situation is developing and make a call. Enemy bot is crippled, the ADC is going to B, enemy jungler is top, ping ping ping dragon ping ping. Slap down a pink and bam, support carry OP.
Being on the opposite page as the ADC in terms of aggression sucks. Having people freak the fuck out over last hitting in a lane where no one is present but you sucks. People freaking out over no wards on the map when there are three wards on the map and an infinite supply available in the store for anyone to buy sucks. Getting fucked all game by Blitz or Thresh sucks.
The rest of it I'm pretty cool with.