I primarily fly on Vatsim and I only fly the A32NX (sometimes the TBM, or lighter for vfr trips). I would love to jump in the 787 or 747, but the MCDU has always confused me (i.e. if ATC clears me DIRECT to a different waypoint). I constantly get confused on how to skip waypoints. Watching video after video I continue to screw something up! The controls and systems I can handle fine. Its just the navigation through the flight comp is what I get jumbled with.