Your attitude to the aeroplane will be predicated somewhat to what you grew up with technically. If you worked Airbus' then you'll prefer them, just as people prefer Boeings to the products of the Douglas Cable and Spring Company. My exposure to A320s and 757/767 said that there seemed to be more electronic gremlins on the A320 with avionics problems that seemed to fix themselves, but frankly there really wasn't that much of a difference. The aircraft works, and as long as you follow their troubsleshooting trees to the letter and dont try and get creative she'll do nicely.