We always pick 17, but I've got a question about 16 vs. 17...same legroom? Can 15 recline into you?

I like the exit rows vs. 6 for some totally different reasons. We have our trips down to a science...right after the carts go by, we get up and use the washroom - we're back just before they get to our row for service. In 6, you are trapped up there until all the service is done - and IF they say it's ok to use the F lav, I really don't like to do that, because when I'm in F I don't care for all the people traipsing back and forth, so I won't do it when the shoe is on the other foot (except in case of an emergency).