User blog comment:DarknessStriker/Which support should I choose?/@comment-4928205-20130520164150

Gotta catch em' all!

Pick based on synergy with your ad, or to counter the enemy lane. Supporting a Vayne? Pick taric, the stun helps her line up condemn. Facing a blitzcrank? Pick leona, and let him pull a freight-train with a sword. Supporting Ezreal? Soraka can feed him mana and let him spam his spells more often. Supporting Cait? Nunu's bloodboil gives her dangerous amounts of attack speed to go with her range. The list goes on.