Another great topic but it's only Saturday for me. There's so many so I'm going to share my top three (in no particular order), but I'm going to exclude tanks.
The Seahund just because I think it's a most unique vessel by K&C (submersible vehicle):
Operation Seahund (2) color by
Western Outlaw, on Flickr
I was really excited to find a DAK Opel Blitz on the 2nd hand market. I've always liked these German trucks in any scale/color and love the removable top:
Blitz! by
Western Outlaw, on Flickr
Lastly, I love K&C's 1.5 Truck. I esp. like vehicles that provide the opportunity to place figures atop/inside:
Proceeding with Caution by
Western Outlaw, on Flickr
then there's the hanomags, but that's another topic/post...