lol hated sucker punch.
I guess I would define a favourite movie as one I can watch every time it's on.
so off the top of my head a short list:
men in black (first film only)
shrek (same deal - 1 is a classic 2&3 so-so - not seen 4 yet)
hudson hawk - never understood the critics panning it - awesome feel good film
any of the alien films except 3 (the one in the prison - rubbish film)
first predator film - what can I say, attractive women in jumpsuits are hot
both the blues brothers films
whoops apocalypse - it's a british comedy film - the scene where the sas attack madam tussauds wax works museum and take casualites, makes me laugh so hard it hurts.
wings of desire. - peter falk plays a man who used to be an angel. Just a brilliant film - not one with mass appeal though.
the thing - probably the best sf/horror film ever made. before digital effects took the skill out of monsters. Everything you see on screen was actually there. Probably the best special effects work ever done, by anyone, ever.
john carpenters - Vampires
In fact pretty much any john carpenter film (yep even the mars one).
and bunch of others that don't spring quite so readily to mind.