I'll bite:
Colorado Pikeminnow - It's a large Carnivorous Minnow. Points for being a Predacious Cyprinid.
Northern Pikeminnow - It's a large Carnivorous Minnow.
Gars - Crococilian characteristics, adaptable, interesting body shape and patterns, and the fact that it's primitive.
Bowfin - Primitive. Means of locomotion. Patterning. And just the overall look.
Esox Pikes - Pattern and Carnivore features. True FW Barracudas.
Paddlefish - Primitive. And it's the friggin' lovechild of the Basking Shark and Sawfish. With less sharpness.
Walleye - Nice looking fish, period.
Trout/Salmon - I just like their life histories and body forms. I can't really give specifics, as I'd like to familiarize myself with species beyond Brown and Rainbow Trout and Atlantic Salmon.
Bonytail - An interesting Cyprinid.
Humpback Chub - Another interesting Cyprinid.
Razorback Sucker - Cool looking fish.
After all, they do say that beauty is in the eye of the beholder.
