Generally, in the bad old days, the only figures were lining tabular. You needed an expert set for anything else. In today's OpenType world you have choices!
It seems to me that default figures should be the ones most people should use most of the time. Let's assume you have included in your soon-to-be-released Opentype face, Oldstyle, Proportional Lining, and Tabular lining figures. What would be your druthers for default and , most importantly, WHY?
Let's see a vote here, OK?
Sorry I can't do the cool form that tallies everything on the fly. Maybe if I were some cool COWBOY or Bezier Wrangler, I could do it but I am not so I just have to hope unnamed guys like that will take pity and set one of those puppies up here on Typophile instead of my lame straw poll :-) Hint?
ChrisL