My 1640 Results with Verbatim MCC 004 and Various Firmwares

yes, I do. Is that bad or good? I always thought that was a good idea. I will be reflashing to BSLB and playing with SB, WOPC, and OS tonight.

Yes, I would. It will make it easier for some stand alone DVD players to see the disc as
DVD-Video. It does not effect the burn quality at all.
In CD-DVD speed you can go into File>Options and on the first page change
the setting to show Book Type instead of Disc Type and then it will show you
at the bottom right of the Benchmark page the disc type as ROM (if it is) instead of +R so you can make sure none of your booktype settings have changed.