Ahhh... a great topic!
Fave has to be Legend of Boggy Creek, hands down. My father took me to the theater (something he rarely did) to see that first-run. I was five, and it scared the bejeezus out of me. To add insult to injury we lived in the country, and once we got home from the movie good old dad pretended he couldn't get the lock on the front door to work and he was "scared" because he could hear Bigfoot coming. Good lord. I was traumatized for, like, years afterwards. LOL. But it also turned me into a hardcore 'Foot fanatic. (Why in God's name hasn't Olive Films, Shout!Factory or the obscure scroungers at Kino Lorber done a hi-def restoration & remaster of this bona fied '70s drive-inn classic???)
Next fave is the under-rated Creature from Black Lake, which has a solid cast, (including Dub Taylor and the always-fun Jack Elam), a tight script and some genuinely decent acting from its two lead actors, and a huge bonus with cinematography from a young Dean Cundey, in his early lean years. Black Lake also dovetails nicely with Boggy Creek by having the same score composer (Jaime Mendoza-Nava) and some of the exact same roar & screech soundbites for the creature. (Too, this one needs an HQ transfer onto Blu-ray, dammit!)
EDIT: Whatever happened to this????????????
Yes, I vividly recall the immortal episodes of Six Million Dollar Man with bionic Bigfoot. And I'll even admit to being a closet fan of Sid & Marty Krofft's cheese-tastic Bigfoot & Wildboy show. ("Bai-Yabba!!!") Steve Austin's adventures are out on some truly impressive DVD sets but, sadly, Bigfoot & Wildboy have thus far eluded capture on digital video, (with the exception of blurry, awful-looking clips on YouTube).
The "In Search Of..." Bigfoot-themed shows were good, with the one focusing on the Honey Island Swamp Monster being exceptional. That one scared the crap out of me, too.