There are multiple configurations, some 777s have 1 or 2 rows of 1st class and some don't any more so the business class may start at rows 1, 2 or 3. Some times the bulkheads are blocked for bassinets until check-in sometimes not, it is quite inconsistent. The seatmaps have proven to be inconsistent too, sometimes...

The difference from one seat to another is not that much, only the middle seat on the 777 sucks a bit. And the very last row can be a bit bothersome.

Overall scoring the 2nd row is the best, aisle or window is a matter of taste. The first row window is nice if you don't mind stowing your carry on in the bin.

My favorite: an aisle with no neighbor in the adjacent window seat (unless it is someone I like).