In my youth I never actually had a memory card for the Dreamcast but would routinely come back, start Sonic Adventure from the beginning each time, and rally through the whole thing in one sitting.

It's a wonder this level of obsession back then didn't send my careening down the slippery slope that many have succumb to when it comes to the Sonic fandom. Maybe the repeated exposure to Big the Cat's levels were enough to subconsciously veer me away from that dark path.