I started as the streetkid one. When the game started in the bar, after moving upstairs I couldn't see anything because some lightsource from outside of the building kept blinding entire monitor when looking at the direction I was supposed to walk. In the intro sequence where you're stealing the car and the police arrive, the police arrived through walls ignoring all collision with their car and stopped in random positions before teleporting to spots they were meant to be and animations were missing from the whole sequence until I was on the ground.
After that it was "little less" terrible like people just randomly spawning here and there in some cases, in others when I entered a car suddenly another car popped inside my car and glitched me through the street. Did some side activity, had to hunt down some cyberjunkie gone berserk or something. Went there and tried to engage but the NPC kept resetting the encounter like I'd go beyond the quest area boundaries despite standing in the middle of it.
Then there's some stupid shit that aren't necessarily bugs but horrible design when I had cop chase me I ran into alley that led to nowhere, ran back and looked behind, suddenly 3-4 cops had spawned in there.
Those are just the ones that immediatly popped in mind that I experienced during my 5 hours of the game or so, thank god Steam let me refund it