Haro Freestylers & Sports as I never saw one in the flesh as a kid as they were too expensive. Also obviously Mongoose, but mainly the nickel-plated gusset ones as my mate had a Supergoose & I had a s/h Ammaco 202 BITD as my folks couldn't afford much at the time. They made up for it when they bought my Cali but there was something a bit "made it in my shed from scrap" like about the early Mongooses and my 1978 Team Mongoose is my favourite bike still after all the builds I've done.
Redlinr Flight cranks were a thing of mystery too and I always wanted one but had to wait over 20 years until I could afford one!