I get on RCU maybe 5X per week and FB maybe 3-5X depending so I guess I like both.

RCU is common interests but often you don't know who your talking to, and often get into disagreements too easily because you don't know the person and you make no effort to see the common ground.  FB is family and friends and has a better photo section so has some advantages.  At any rate, I invite any car/boat/airplane persons to friend me on facebook, my email is:  [email protected]    [8D]