1F, although I'm a left-side-of-the-plane person, until all the converters have been sent to the great seat graveyard in the sky I prefer the F side.

On the converters, when travelling alone, there's more space to the person in 1D and when travelling with the OH we can sit right next to each other.

I love the bulkheads (and would think twice about booking CE if they weren't available). At 6ft 1" I feel like my knees have infinitely more space in row 1 than in the claustrophobic row 2 and beyond.