You know, the kind that you make think, "For the love of god, WHY"?
I'll start with a couple:
1) People who have more than enough time to make their move, but wait until another vehicle is dangerously close to do so.
Example: You're 100ft away from an intersection, but the person on the opposite side of the lights that wants to turn left, waits until you're practically in the intersection to attempt the turn.
2) People in parking lots who exit their stall while only looking to ONE side. This is most common with drivers who get very confused by that pesky "Reverse" maneuver. lol