Well, I am sure the regular adapter is fine, but I like taking the 3-prong and keeping it in a surge protector. I pop the power cord onto that when I am at home. When I leave, I pop the folding travel plug back on and put the cord/plug in the bag with the computer. I leave the 3-prong at home. The battery life is pretty good, so I don't have to charge it away from home much anyway.
I really don't need the extra reach either, but for the daily charging I like the 3-prong in a surge protector. Its really no extra trouble and provides some measure of extra protective advantage.
Scott