I am curious how everyone considers Mechanics when purchasing games? When I listen to some podcasts I hear in the gaming community there are many players who really enjoy certain types of games or mechanics and they don't like to start from those. That may in part be a benefit to being able to play/own 100's of games.
Since I have to consider many different things I personally like to choose games that have some mechanic(s) I don't already have or are a unique spin on those mechanics.
I have quite a few Worker Placement games and unless there is a spin I think I'd like (#Architects of the West Kingdom for instance) then I often move on as soon as I hear it, or shortly after because I'd like to vary my collection.
What do you think? What do you like? Do you have a mechanic you always love and will buy any game with that mechanic? Do you avoid mechanics you already own? Why?