Well just finished a week of final destinaton watching! FD3 last sunday, FD1 last night & FD2 tonight.
Made me realise how FD3 isn't linked to the other 2 at all really not like how FD2 is quite strongly linked to the first.
Anyway I think FD2 is best, it has more of a story, followed by FD1 for it's originality then FD3 because it completely lacks a plot and storyline.
Good series though and I actually still think there's room for a few more.