I have a couple Lionel 1615s and a 1685, an 8200 docksider?, also a General and an MPC looking 6102.
What are your favorite and/or best looking 4-wheelers? I know that for some folks the Lionel 4 wheeled locomotives are the less detailed and/or less desired choo-choo trains, but a lot of us probably started with the four wheeled locos - and I'm interested to hear what your favorites are. I always liked the look of the locomotive as long as the running gear were detailed, with the exception of the 8200 docksider - I thought the docksider looked cool even with the simple running gear and plastic body.
Pictured is a 1615 that my grandfather stored for me 30+ years ago and it suffered some chemical paint damage and the front markers were broken. Anyhow, I rebuilt and repainted it into a local theme (that never existed). I still need to replace the headlight lens.