I totally loved the last episode personally. It was nice to have a bit of fun in there really in the finale. Also the episode before with Clocked Bender was awesome too. Great end to the series imo.
What I liked most about the last episode was how each segment had a joke in it about the viewers not being able to see what the characters could see. In the black and white one they got a new shade of colour - we could only see it as another tone of grey. The 8-bit animation had the professor finding the smallest possible unit of matter and to us that is just one single pixel, which is the smallest unit in terms of that kind of animation. And of course the Anime bit with its hilarious Zoidberg dancing which we cannot see due to the whole following Amine protocol of panning faces and words while the exchange happens.
Really I thought it was a clever and enjoyable different kind of episode. Plus the beginning just cracked me up enough that I loved everything afterwards regardless. When Fry and Leela in the black and white world, where they were just holding hands on the balcony of the Planet Express building watching the city and all it's typical Steambot Willie style with the bouncing background buildings and them too silently bobbing constantly and Leela just says "It's the stillness I love" or something. Its just brilliant.
Anyway I'm looking forward to the new series a lot more than I was a month ago.