Outfit with the most votes
Romana in Destiny of the Daleks and Martha in Blink, both with 15 votes.

Outfit with the least votes
Bill in The Pilot.

Highest Average Votes per outfit (excluding characters with only one outfit in the round)
Winner: Romana 2 (12 votes per outfit)
Second Place: Martha (11 votes per outfit)
Third Place: Yaz (10.6 votes per outfit)

Most Winning Outfits
Yaz (2 outfits)

Highest Average number of winning outfits
Ryan (1 outfit, 100% success rate)
Second Place: Yaz (3 outfits, 66% success rate)
Third Place: Nyssa, the Romanas, Martha, Bill (2 outfits, 50% success rate)

Taking a week off since I'm on leave, then I'll start the quarter finals!