Kev, you've hit the nail right on the head IMO mate
Resident DJ or "name" guests do longer spots, as people are usually aware of what to expect from them and that's what your attendance is built on.
Others do a shorter spot - It's good to have fresh faces and this can help with introducing new sounds to the regular crowd, or in having an "across the board" policy (if that's your thing). But if you divert for too long from an expected style of music, then some will be disappointed.
DJ's listen to what's being played before them? SPOT ON, though some listen and still repeat a handful of your spins .
Personally, in the very near future I will be forgiving the odd bit played twice as some tunes might be missed during the outdoors smoke break
As for writing lists - have a look at my box, all my sleeves are written up in 1/2" marker pen! I can't read anything smaller
Kevin.
"STOLEN HOURS"
RAMSGATE 21st JULY