I'm personally not a fan of Row 6 at all. It's quite loud due to engine noise and if you don't have noise cancelling headphones, watching movies with the stock headphones means you have to crank the volume quite loud to make out dialogue especially if the movie lacks subtitles (some older films). I'm booked on 6A for my next trip, but will gladly trade it for any forward cabin window seat. Row 6 is fine if I'm just going to knock out but if I'm going to be up I really appreciate less noise. Footwells don't matter that much for me. I can sleep like a baby on the plane anyway.
On a side note, for those SFO based flyers, I'm a huge sucker for views of the city.
