Mobility
Whether you’re speeding around as Tracer, or slowly stomping as Reinhardt, each character in Overwatch feels distinct as you navigate them around the map. This not only helps to make each character feel unique but also helps to make your choice of Hero that you’ll take into battle that much more tactical. Do you want a heavier character who packs a bit of a harder punch but is more difficult to move out of the way of damage, or would you rather have a quicker character with less firepower but greater agility on their side?
Blizzard has nailed mobility in Overwatch to the point that it’s a pretty significant factor when deciding whether you should change your Hero mid-way through a match to adjust to the play of the game. Future class-based shooters, take note.