Can't help feeling It's a Wonderful Life is a bit of an odd one out there :lol: . . .

Taxi Driver
Scum
Blue Velvet
Repo Man
Basket Case
Videodrome
Repulsion
Seventh Seal
Threads
To Live and Die in LA
One Flew Over the Cuckoo's Nest
Texas Chainsaw Massacre
Jubilee
The King of Comedy

my top ten of my head,could change though once ive looked through my collection!
no order but

evil dead
t.c.m
m.s pieces
haute tension
broken
madman
the burning
friday 13th pt 1
the warriors
jaws

Apocalypse Now (my all time favorite and is liable to stay there)
X-Men (Fave comic book movie, though may well be displaced by Dredd)
Hot Fuzz
Don't Look Now
The Bird With the Crystal Plumage
Robocop
Aliens
The Lord of the Rings Trilogy (Kinda cheating, bur hey, what ya gonna do?)
Excalibur
The Forbbidan Zone

This list is only moulded to my current tastes, I have no doubt it will change over time.

Here's my current top 10:

High Plains Drifter
King Kong (1933)
Jaws
Close Encounters of the Third Kind
Blade Runner
Assault On Precinct 13 (1976)
The Thing (1982)
City of the Living Dead
Witchfinder General
Deep Red (aka Profondo Rosso)

Its not all monster and maniac movies I like, I also rate The Lake House, Superman 2 and The Princess Bride amongst other faves.

My favourite films aren't all horror movies either as my top three favourite films are, in order, The Exorcist, It's a Wonderful Life and Dr Strangelove.

Dr Strangelove is one of my favourites, too. I thought I remember you saying you were a Once Upon a Time in the West man, Nos...?

My top 3 (for the moment, anyway!) in order are:

Solaris (1972)
M (1931)
Videodrome (1983)

I am, that's my favourite Sergio Leone movie.

Ah, my memory does indeed serve me well (for once)!