Another vote here for the east coast day flights. We came back to LHR from BOS on the day flight in December and are booked on the same flight over Easter and again in the summer. East cost flights are way too short to get a decent sleep and I find the day flights help us get back into local time way quicker than night flights. We tend to choose the Embassy Suites at BOS - we like the rooms, their shuttle works well and typically cheaper than the Hilton.