These are some of the most memorable to me
Jason vs Ross - Ross asks Jason to "Step outside" Jason refuses.
Sal vs Ross - Sal comes out of nowhere with his grudge against Ross and shits all over him.
Jason vs Depace - Jason makes fun of Scott's "Video caddy" invention. I don't think they ever had one big argument, but just a bunch of little digs here and there at eachother.
Jason vs Ralph - Jason lets everyone know what a tyrant Ralph is on Geek Time. Ralph gets upset, denies everything, calls Jason a liar and questions his work ethic.
Ralph vs Gary - There are quite a few Gary vs Ralph arguments. The 2 most memorable to me are: 1. Back on FM radio they got into it big time about Ralph stealing Gary's seat at the private screening for Private Parts 2. They really got into it at Sirius once, but I can't recall why. I just remember Gary yelling that Ralph was a "Fuckhead" and he kept talking over him. Pretty funny.
Artie vs Sal - This is hands down the most vicious staff fight. Sal shits all over everything Artie has done career wise then takes some personal shots. Artie threatens to "beat the fuck out" of Sal downstairs, calls his kids fags and says he hopes they get aids, throws something at Sal.
Gary vs Depace - Gary went off on Depace about giving Howard the tape of Gary sleeping during the show. It was more one-sided because Scott didn't really argue back, but Gary unloaded on him.
Howard vs Artie, Robin, Fred, Ralph, and Gary - When Howard unceremoniously left Gary's dinner party early and everyone was giving him shit for being self-centered and rude. Howard gets backed into a corner and starts ripping everyone. More hilarious than vicious.