How does Yasuo ult interact near a tower? Will Yasuo try to get out of range of the tower?
According to lolwiki:
Last Breath will attempt to position Yasuo outside the range of a nearby enemy turret if he initiates the ability on an enemy standing close to one. This does not, however, apply to the Nexus Obelisk.
Another interesting fact that I found in the description of the ability:
The cursor's current position will influence the ability's auto-targeting, although it is not technically using quick cast and having your cursor near a valid target is not required to activate the ability.