I only fly ANA in Economy Premium (or better, if lucky). I've found any seat in the area good, with pros and cons for the bulkhead:
1. Aisle bulkhead seats are fine, the walls help keep the cart from hitting you.
2. Aisle seat in bulkhead row is mostly unnecessary anyway. The window / inner seat can get to the aisle without disturbing the neighbours, unless the aisle neighbour is both tall and fully reclined with the legrest up, and provided they haven't set up shop (bags, etc) in the extra space. This means that even though you lose the under seat storage location for takeoff/landing, you can get to your overhead bin easily for a good portion of the flight from any bulkhead seat.
3. All economy premium seats have the tray in the arm, so there is no difference here.

Cons:
1. There's so much space that some people will use it as a cross path to the other aisle, which can get annoying if you're watching the screen on the wall, which brings me to:
2. No privacy, everyone can see what you are watching. As someone who spends 90% of his time watching the flight path, sleeping, or drinking alcohol this isn't an issue, but it might be for others.

Here is an image (not mine) which well help (you will likely be on a B787): http://www.aviationwire.jp/wp-conten...87_ana-640.jpg