Maybe these threads might help a little
http://tentenths.com/forum/showthread.php?t=110096
http://tentenths.com/forum/showthread.php?t=105780
2nd thread goes on to explain some of the feelings between bike & car marshals.
Most of us get on really well, but as in normal life there are personality clashes, I'm better than you views, mines bigger than yours etc etc. You get the picture.
Unfortunately we only remember the ones who don't get on or the ones that cause arguments not the ones who work together well & have a good safe day on the bank.
1 thing though, bike marshals do have a bit missing
( I do both)