Cheers everyone who posted stuff.
I think it's true that whether you were exposed to them as a kid makes a big difference to your opinion of the in later life. I used to think I must have grown up in the only family in the country that didn't own any Beatles at all, not so much as a copied Best Of cassette. It's quite nice to know I'm not alone in this.
Right, well I like 'Day Tripper' because it has a cool riff, and 'Paperback Writer' too. Also 'Helterskelter' for its proto-metal freakout craziness. And I know some people call the sitar the instrument that ruined The Beatles, but I do quite like their some of their later, more trippy-hippy stuff (even if it's impossible to hear it these days without thinking of Austin Powers).
The stuff that really puts me off is a lot of their very simple, merely 'pleasant' songs that I find irksomely anodyne. OK, so there's probably all sorts of musical complexity going on under the apparent simplicity, but I can't really be arsed to listen hard enough to make it out, because those kinds of song just don't hold any interest for me.
Oh, and 'Yellow Submarine' can fuck RIGHT off.