Been mucking with Half-Life since the original on my overclocked Pentium 120. I anxiously awaited the release of HL2 and have had plenty of fun and frustrations in the SDK.
If you played a CS: Source map named DE_KneeDeep, you can thank me for that. Go me! Now the proud creator of TF2's ctf_escherhaus which has apparently been popular on a couple servers. Would love to hear feedback from people who've played the map.