Right here. Look to the left.
Last couple of months I've been playing mostly DooM, little Wolfenstein.
However starting from 1/1/2011, the best mods (as in, games with significant modifications to the original experience) are probably Guns & Glory 0.5, Eisenfaust Origins, and Stealth.
As for mods with some code changes but still the general original feel/gameplay, probably Wolfenstein Sextilogy SDL, BMSE 10-year Anniversary Edition, 15 New Ones, Time to Kill, and maybe Iron Dream are good choices.
For stuff with very minimal or no code changes (i.e. just mapsets), try the DHW SDL Wolf3D and SoD mapsets, This Spear SDL, 10 New Ones, Thomas' Wolfenstein 3D, Desperate Measures Episodes 1+2, Ipank7000's Wolf3D Mapset, and SoD Extreme.
Last edited by WolfForever on Sat Jun 01, 2013 4:49 pm; edited 2 times in total