I agree with those who say move further back. A long time ago I always tried to grab the first row behind the curtain in either the A or C seats because back then the way the convertible seating worked the first row of A/C still had the middle seat squished while D/E/F were normal size this was to allow the trolley to deal with the adjustments to the aisle.
These days I see no benefit of being in the first row of economy. You will get your water first but that's it. If you want to order something more substantial then pre-order from the Speedbird Cafe as the pre-orders are the next to be served after the water run.