Here's a list of some things I'd be interested in:
no. of tournaments participated in during the season.
no. of tournaments made to the second round (%).
no. of tournaments made it to the prizes (%).
The above three perhaps broken down by regular and gold foil tournaments.
Total DEC paid to participate in tournaments (not essential though).
Total DEC won in tournaments.
All tournament participations sorted by win/loss record (so you can figure out which tournaments are particularly working well for yourself).
Table of win rates by categories:
- A,B,R,P,U,D (edition included, overlapping obviously)
- gold / non-gold
- new player, bronze, silver, gold, diamond (card level cap basically)
- anytime / timed
In terms of importance, I'd say it's roughly in descending priority for me. Does this roughly make sense to you? :)