I liked Doom, more than for itself, as a milestone of gaming, I wouldn't buy it just to play it with better graphics. OTOH, with the same engine slightly improved, I liked VERY much Hexen I and I still like it.
But like Doom, Hexen too had a big engine limit, the impossibility to have overlapping locations, simply porting them to HD graphics would leave them with levels quite outdated for our current standards (although Hexen I did a much better work than Doom to give the illusion of having more than one story in buildings simply using a very clever level design).







