Passenger side has a higher chance of getting hit, since there will always be a driver getting out of the next car over. However, kids are often getting out of the passenger side (or both rear doors), and are much more likely to throw the door open.
I have a co worker whose honda is riddled with dings on his driver side body panels and it's from his kids in his own garage
my stategy for avoiding dings is to park far out, find an end spot and cosy up to the curb side. If I have to park in a regular spot, I still park far away (since the door dingers are more likely to wait for a close space, than walk an extra 75ft) and center my car in the stall.
I also prefer angled parking spots to perpendicular ones...