I do allow fledgling PC awnsheghs following the rules in the Book of Regency. But the moment they give in to the call of Azrai´s blood, they become NPCs. However, my players were lucky so far as they have a knack for not rolling Azrai as their bloodline derivation, so I decided to let one of their closest allies become an awnshegh. Let´s see if they discover it before they fall victim to their former friend. Or maybe a cure exists... ;)

In a Dragonlance game my character and his fellow party members, mostly champions for the cause of good, had a confrontation with a very old vampire (greetings to Dr. Van Richten ;) ) who turned us into special undead under his control. So the DM converted our characters on a case-by-case basis and we proceeded to play them, and infiltrated the OTHER Dragonlance party that was playing parallel to ours. It was very funny since noone knew we became undead, they just thought we were MIA :) . Boy, were they wrong. We had to keep ourselves from laughing out several times. They let our fellow undead Knight of Solamnia, who never breathed, ate, drank, slept, showed his face or put off his armor, stand guard at their nighttime camp... alone... for 8 hours... every day for a week :) . And the vampire had told us not to kill anyone as long as we remained undiscovered.
I´ve never seen a bunch of players with so much luck in all the years since I started playing/DMing RPGs.