I have actually picked the other options--synthesis for my full paragon sentinel & control for my *barely* paragade infiltrator
I went all funny when I played ME3 and dumped my renegade attitude from the first two games. Choosing to go full paragon made the synthesis route seem more appropriate.
I downloaded the extended ending DLC (and that was extended? Did PC players just get dumped to a DOS prompt after making their choice?) and went for the none of the above at first. I didn't realise there was a post credits scene giving that a thumbs up either.