Kenjaxom: When I move with ASDW sometimes (very often) the screen with jolt one way or another. It's seem to happen more when I stop, but seems to be super random too. If i have to play old school BG style I will but i really like the over the shoulder look.
Firstly, if you haven't rebooted your computer in a while, do that.
NWN2 uses timers that become full and are only refreshed upon cold boot. (or you could try the NWN2 client extension)
Second, small changes in your character mode settings can have a big effect.
I'll put my nwn2player.ini character settings here if you want to try them.
[Character Mode Options]
Mousewheel_Speed_Min=1.000000
Mousewheel_Speed_Max=10.000000
Mousewheel_Speed_Default=5.050000
Mousewheel_Speed_Current=2.260000
Mouse_Turn_Min=0.050000
Mouse_Turn_Max=3.000000
Mouse_Turn_Default=1.000000
Mouse_Turn_Current=0.168000
Edge_Turn_Min=3.000000
Edge_Turn_Max=10.000000
Edge_Turn_Default=5.000000
Edge_Turn_Current=3.210000
Camera_Lag_Min=1.000000
Camera_Lag_Max=30.000000
Camera_Lag_Default=5.000000
Camera_Lag_Current=7.090000
Fade Objects=1
Show Move Cursor=1
Mouseover Highlight Flags=74
CameraMode=0
LeftClickAction=1
Ceiling Draw Mode=0
PossessAsDefault=0
CameraFollowAlways=0
MouseMovement=1
Enable ScreenEdgeCameraTurn=1
