I'm just curious to see the opinions from this community. Steam is a bit trash for that kind of discussion.
My most used sourceport is Eternity Engine. Has enough options for me and seems to be quite accurate overall to me. I run it at 640x480 for that sweet nostalgia-filled pixelated filter. (Original resolution is a bit too low for my tastes these days.) I also love that I can see the "credits" when leaving the game. It's fun to be able to see those in my opinion since a lot of fan made project got their own. Reading those is another level of nostalgia. My only gripe with it is that I can't seem to find any ways to record demos. Before that, I was using PrBoom+ and I would record my play sessions. So, I can upload videos to YouTube when something interesting happens. If any of you know how or if the port does not support this, I would like to know!
I want to add special mentions to the Unity port and Crispy Doom. Because, I believe those are by far the best ports for first time players.
EDIT: Also, let's not turn that into a fight about which sourceport is best. I'm interested in your opinions, not a debate. Thank you. :D