Whisky Galore (aka Tight Little Island, I believe) is likable. A Run for Your Money had charm (but then I'm a sucker for a Welsh accent). Passport to Pimlico is very nice. But it's the Guinness films that really shine; watch them all and be happy. (It's not an Ealing comedy, but I'm also partial to the bittersweet The Last Holiday; I cannot imagine the travesty that the Queen Latifah remake must be.)
If you want to go beyond the comedies, check out Dead of Night and, if you have a romantic bent, The Captive Heart.
And you might also want to branch out to the Boulting Brothers: I'm All Right, Jack (a young Peter Sellers, Ian Carmichael, Terry-Thomas), Lucky Jim (Ian Carmichael again, and one of the few movies my father has sat through and enjoyed more than once), etc.
I envy you watching all these for the first time. You have larks ahead of you (which reminds me: you can also catch Guinness in David Lean's Great Expectations, a lovely film indeed; for that matter, he's Fagin in Lean's Oliver Twist. And speaking of Lean, you really shouldn't miss Blithe Spirit, in which Margaret Rutherford does a star turn as a very hearty medium. Boy, I do love me some British film, don't I?).
P.S. Michael Powell!!!
