2 minutes ago, a1bert said:

1. You are focused and/or hidden and want to save your attack for a more juicier target instead of Greedo, who is no longer a threat this round.

2. Especially if Greedo is performing Parting Shot, unless you have very good after attack resolves / after resolving an attack abilities.

Ok. I can agree with that. I like when people attack Greedo. He's meant to be annoying.