On my Doom site I only list the wads I rate 3/5 or better. There are so many Doom2 wads out there I could never list them all. And some really suck. Out of the last 10 I played I only listed 3: Hybrid Fragments with 3 levels, Eclipse with 18 levels, and Claustrophobia: The Walls Close In with 3 levels. Both of the 3 level wads are worth trying.
http://edsdoomsite.tripod.com