User blog comment:TheHellDoIPutHere/Supports and You/@comment-5761259-20130721040232

I think I've had about 20 good supports in my year of playing, though I've played ADC for about 4 months now. What I look for is a support that talks to me. If they ask me if I am going to be agressive or passive, or similar questions, then I usually have a great lane, because my support knows I want or don't want them to start fights. Of course, they should kind of know based on the champs but I am fairly confidant on some champs and may want to be more agressive than a normal one or it may be my third game as Varus and I really have no intention of trying to duel the Graves despite probably being able to.

As for if I think supports are a deciding factor, kind of. Supports can feed either ADC if they are good or bad. Similarly, you can miff your Sona ulti, or hit it and make or break a team fight. How ever, supports are just as reliant on their team as anyone else. If every one of your lanes feeds, then you can ulti all 5 of them as Sona and still loose the teamfight because the damage isn't there. It's the same concept with any role. You need to do your role as well as you can and hope that your team mates can do the same. I don't think any one role is more deciding than another in their own ways, supports just have a less flashy use than say a Katarina.