One of my  memories of classic Starcraft was the Protoss Dragoon doing their little pathing dance on big teamfights, never shooting.

Pathing problems happened with all units and this was specially noticiable when going up on any ramp but Protoss Dragoon was a special offender. I'm sure Siege Tanks probably suffered from the same issue but since they were used mostly in siege mode this was less remarkable.

One of the things which surprised more on Starcraft 2 was not the fancier graphics or new units but how a bunch of zerglings could move like a stream of water.

I wonder if we had better pathing on Starcraft 1 Dragoons would been more popular...