One exception to the rule for business class that "no 2 seats in the entire cabin can see/converse well" -- E and F seats in alternating rows can see each other due to a gap between the middle seats, so e.g. 6E looks over the shoulder of 5F, and 9F likewise looks over the shoulder of 8E. This pairing might be good if traveling with a partner/friend. Next best is probably C/D or G/H in adjacent rows so you can see each other across the aisle.