I don't play a lot of mando either, but I do a lot of jigs on guitar in open tunings. I always play DUD UDU. I use the same pattern whether playing lead or rhythm.
However, I have not always done so. I used to play DUD DUD and nobody ever shot me for doing so. One night I was at a party and another player was playing DUD UDU and what he was doing sounded so much better than what I was doing that I started working on it the next day. It took quite a bit of practice to be able to give the U on the four beat the same emphasis as the D on the one beat. The natural tendency is to want to play all the accented beats with downstrokes. Now, I couldn't possibly play a jig DUD DUD.
Brucebold html fixed by mudelf ;-)