I love a good multi, feels more like a "proper treasure hunt"
My favourites are ones that take me round towns, showing me all the interesting places.
Which is fine if it's just me and/or my son or the decoy dog.
But I find if I am with other cachers they are mainly going for numbers - trails in the country or lots of drive bys, depending on who it is.
I think the two main reasons for people not doing them are as you said - too much work for only one smiley, and not knowing how far it is going to be/how long it will take/where you will end up.
I've got 5 multis, one is a bit longer (takes about 45 mins to an hour) but none of the others is more than about a quarter of a mile and two of them are actually en route if following a trail of trads - and yet folk don't bother with them.
I agree though that they do get more favourites from the cachers who make the effort.
GAGB Member since 2009
UK Mega West Mids Committee - Treasurer 2011 - 2013
GAGB Committee - Treasurer 2016 -