I just did the 777-200 & the 767-300 this week, both in Y. The 767 is one of my favorite planes for daytime flights - great aisle to seat ratio, so moving around is easy. However, as far as I could tell there really aren't any "better" seats in E+ on this aircraft. My flight on this equip. was outbound, IAD-ZRH, overnight. In the end, I didn't sleep terribly well in my standard E+ seat.

The 777-200 daytime return flight was great. But (and this is a big but) I was in the first row of E+, where the configuration is 2-3-2, not 3-3-3. Those '2' seat sections have lots of legroom - I could extend my legs horizontal and not touch the bulkhead when sitting upright. There was no problem getting in and out, and almost no random traffic in that area. There are similar bulkhead seats at the front of the E- section, but I walked back there and wasn't impressed. There is a lot of lav traffic in that area. I also like keeping the window open for a daytime flight (who wants to sleep during the day??), but my three windows were just about the only open ones in the entire economy cabin. Since I wasn't in the middle of the cabin, I didn't feel like I was disturbing too many people.