I'm been reading Wodehouse since I was 15 and while I love nearly all his stuff, I find the Jeeves/Wooster cycle to be his finest achievement. The Jeeves books are ALL top-notch and oojah-cum-spiff, particularly those published between 1930 and 1949. VERY GOOD, JEEVES is one solid belly laugh, with all those vintage stories about Bertie Wooster's various antics: puncturing the hot-water bottle, sliding down water-pipes to escape an irate Aunt Agatha, etc. etc. And THANK YOU, JEEVES---- the first PGW that I ever read, a real classic, vintage stuff about our bumbling hero trying (unsuccessfully) to survive all sorts of ghastly vicissitudes without his smarter servant. And RIGHT HO, JEEVES, with that freak Gussie presenting the prizes at Market Snodsbury Grammar School...and THHE CODE OF THE WOOSTERS, best parody of a whodunit that I've ever read...and JOY IN THE MORNING, with all those crazy botched quotations, 'fretful porpentine' and so forth... and let's not forget THE MATING SEASON, which is simply an old-fashioned musical comedy without the music!
Great stuff, all of it.
As for the Blandings books, all the titles are good, but I would especially recommend LEAVE IT TO PSMITH, SUMMER LIGHTNING, and UNCLE FRED IN THE SPRINGTIME. And then there's that wonderful stand-alone book, LAUGHING GAS, which I love. It's PG's one foray into science fiction.