Something I have realized over these past few months, is that people also have personal favoritism (of course,) when it comes to canon. This may be considered a form of Kryptorevisionism... of which I won't go into detail because I think everyone gets the point.
What Star Wars films do YOU consider canon?
As for me:
"Star Wars" & "The Empire Strikes Back"
To me, anything coming after those movies (not chronologically; I mean anything made after that,) is simply Expanded Universe, and I dismiss it on an overall basis. Truly and honestly, I don't take episodes 6, 1, 2, or 3 very seriously at all.