I thought I had gotten good at parsing during the klinton administration, but that sentence is a toughie, even when diagrammed. My interpretation is that Bilbo is saying he likes some, would like to like some more, more, and there are some he DOESN'T like.
That reminds me of the line PJ added a few seconds before (I don't remember who said it): "Hasn't Bilbo been sampling some of the Old Gaffer's home brew?" "Well, yes he has, but that's not the point!"
Well, if Hillary gets elected, we'll probably get "two for one" again, and Bill will be (one of our) president(s) all over again.
Yes, I love that line by Bilbo, made me laugh out loud while reading the book. Like Jackson's addition, too.