Amelie (feel-good, escapist stuff)
Godfather films
Life is Beautiful (feel-good, then feel really crap, but good)
K-PAX
Glengarry Glen Ross (excellent acting, all round)
Out-of-Towners (Jack Lemmon, my fave)
The Goodbye Girl (any Neil Simon, in fact)
Moulin Rouge (escapist, and Ewan McGregor, phwoar!)
Back to the Future
Grease
Quadrophenia
most Carry On films
Bond films
Get Carter (orig)
Italian Job (orig)
Clue
Rocky Horror
Saturday Night Fever
Pulp Fiction
Reservoir Dogs
Murder By Death
Gypsy
Death Trap
Some Like It Hot
Pink Panther films
Blazing Saddles (never get sick of that film!)
Little Shop of Horrors
Shrek
Leon
anything by Terry Gilliam
Little Voice
Sleepless in Seattle
When Harry Met Sally
Terminator films
King Creole
American Beauty
Howard's End (only bcos you can see me in it!

Jailhouse Rock
any Marx Bros
any Laurel & Hardy
Thelma & Louise
Shawshank Redemption
Shallow Grave
Memento (sp?)
Let Him Have It
Planes, Trains & Automobiles...
yeah, The Negotiator is good, recommended....
...and that's just off the top of me head!