I haven't been to Haneda, but I have done Narita and that's an interesting airport when you are just coming off of a 14 hour flight and trying to connect to your flight to Manila
Dublin's terminal 2 is my favorite international airport. Love it. I think my favorite airport in the USA is probably Raleigh-Durham. I also like PDX.
For this weekend, I'm doing the Houston-Hobby to Dallas-Love run. So easy to get in and out of.