My red '97 C1500.
I know it's probably boring compared to most of the vehicles others will list but I absolutely love this truck. It's been in my life since I was eight or nine years old. First street legal vehicle I ever drove (when I was 10 or so) and did a burnout in (not much later). I've got too many memories associated with it to count at this point, down to the crooked mudflaps that were my fault as a kid. That and it's just weird... According to CompNine it's a one of one for '97, my dad ordered it with some really strange options. Standard cab long bed V6 Silverado, but with cloth buckets, vinyl floors and premium stereo. I've done my best to make it weirder and slower.
Pretty sure it's the only V6 C1500 with a 4L80E now...