I guess my favourite beer at the moment is Robinson's Old Tom, though I'd rather get it on cask than bottle as it's normally better value for money in a pub (i.e. £4/pint rather than ~£3 for a 33ml bottle). I'm also a big fan of Old Peculiar, I did a home brew batch of a OP clone which is maturing at the moment - tastes great but I just need to give it more time to carbonate!
For ciders I've a soft spot for everything I've had by Henney's.