I will not use teams who have won or have been featured multiple times already
My teams:
Nancy and Emily (Season 1) Original underdogs, battled their way to F5 and could've gone farther if they hadn't given up in Thailand
Mary and Peach (Season 2) One of the best early chances of an F/F team winning, surprised they weren't in All-Stars.
Ken and Gerard (Season 3) Such and awesome team, fun to watch and performed well. Surprised they weren't on All-Stars.
Jon and Al (Season 4) Same as Ken and Gerard
Colin and Christie (Season 5) Colin is one of the best racers to ever compete.
Kris and Jon (Season 6) Performed well, but also had a very positive view in a very negative season
Meredith and Gretchen (Season 7) They were so awesome and lucky their first season. Could lady luck shine on them again?
Erwin and Godwin (Season 10) I think they can do a lot better without the rest of the "back pack" slowing them down
Nathan and Jennifer (Season 12) A bit of a train wreck, but I loved watching them and they performed pretty well until Taiwan
Toni and Dallas (Season 13) I feel they can be a bit underrated, and feel they should have been on unfinished business
Jeff and Jordan (Season 16) They got screwed over left and right in Europe, and I think they could do a lot better than they did
Brooke and Claire (Season 17) Very fun and entertaining team that performed very well throughout their season.
*Note: I did not choose from Seasons 9, (only season I didn't watch yet) 14 (so many teams have been used already), and 15 (least favorite cast).