I don't know about "best", but my favorite over the years was a '65 Dodge window van. Slant 6, 3-on-the-tree, slow. But it was a gas to drive, sitting over the front wheel with a nearly flat steering wheel. Had a lot of good times in that rig! Most reliable was a '71 Toyota PU, started every time even in Minnesota winters. Most nostalgic, '53 F-100 just like my grandpa's.