I am so glad I'm not the only one who does this. The opening credits and theme tune of some of these films are all I need to give me a lift.
As to which are my favourites though...Oh Boy, there are so many I don't think I can list them. But here are some favourites.
OUATITW obviously. The greatest opening sequence of any film ever.
But I am also a sucker for some of those kitsch 60s theme tunes so I get a real buzz from watching the opening credits of films like:
I am Sartana, Your Angel of Death
Duello Nel Texas
And then there are any of the Sollima films (great opening themes) and of course Companeros!