I do like many of the titles mentioned, but as for those I actually watched several times and would probably watch again:
1. Alec Guinness in 'Kind Hearts and Coronets' easily tops my list.
2. His 'The Man in the White Suit' comes second.
3. Then there's Claude Lelouch' 'Un homme et une femme' and 'Toute une vie'.
4. As per Howard's post, any of the original Pink Panthers.
5. But it is not all Comedy and Romance, I am not impartial to action movies. I do like very much any of Schwarzenegger's early movies, including 'Total Recall' and 'The Running Man', and of course much of Bruce Willis' movies.
6. And Bruce Lee's 'Enter the Dragon' is a classic masterpice.
Speaking of Enter the Dragon, Bruce Lee fans might find this interesting:
[YOUTUBE]MseMobwg_mo[/YOUTUBE]
It's 25 minutes long, but worth listening.