Another P.G Wodehouse fan here. Probably my favourite writer because he never fails to make me smile.
I've read over half a dozen of his Jeeves and Wooster novels and a few of the Blandings stories as well. I definately think Jeeves and Wooster are his greatest creation. I enjoyed the Blandings books but they lack something that the Jeeves and Wooster series possess. I think it is the fact that the J&W books are written in the first person which makes them more enjoyable, because you are cloaked in Bertie's lovable gullibility.
My only complaint about Wodehouse is, as other people have noted, that he can be a bit repetitive. The plots to the J&W books are very similar and consequently I can't read one after the other, because it feels too much like treading old ground. Many of them feature Bertie becoming engaged to somebody he doesn't want to be engaged to and trying his best to get out of it, invariably making things worse before Jeeves steps in to help him. I find I have to read a different author after Wodehouse and then start on one of his other books later.
I'm hoping to one day collect all of Wodehouse's books but since he wrote about 100 it might take me a while.