I generally end up with 1-2 of most Guilds such as Horsebreeders/swordsmith/assassins/thieves/Knights(templar, hospitaller) all in key locations. All the rest end up as Merchants Guilds, except for one Theologian guild i usually have stationed in the middle of the map.

I've personally never seen the Mason's Guild (not through lack of trying), since it would take a stupidly absurd amount of build/destroy in the same place over and over
Spoiler Alert, click show to read: 
(If you build a mustering hall [1 turn] over and over, you could build up the points for it 10 at a time)
. Most of the time i can't afford the drain on my Income to go through the numbers to get the Masons Guild, since if i did i would fall prey to an invasion due to a lack of military on my part.