I never really liked his work on Slaine at the time or even Dredd at that period, but was really taken by some of the covers he did. I later met a guy called Rufus Dayglo (who I now think has since himself drawn for 2000ad - I know he did tank girl) who was covered in McMahon Tattoos. He would get the actual Mac to specifically design them for him. Rufus also said (back in the early 2000s) that McMahon now and then was a bit strapped for cash so he would buy old 2000ad original artwork pages or commissions off him. Probably not a bad investment. He wasn't paying very much for them. I remember saying I wasn't that into Mac's work, and I really regret that now as I have come to really appreciate his stuff. It's weird, I didn't think tastes changed like that. I was really into Ian Gibsons stuff, but I'm really not so interested at all now (not that it is bad, it has great style).
I have never tired of O'Neil, especially his first work on Nemesis - comic rock, and the original opener of the Gothic empire (which got shifted down to book 4 for being a bit too out there to kick it all off). In my mind Nemesis lost it during the Talbot run and I left 2000ad in the 90s. I did come back at some point when I moved to london. Not sure why. I just found an absolute shit load of progs under the stairs that I had forgotten about, so I must of given it another crack for quite a few years. It's the few golden age early 80s progs that I still have that I really treasure though.