Glenn Quinn — Irish Actor born on May 28, 1970, died on December 03, 2002

Glenn Martin Christopher Francis Quinn was an Irish actor in television and film, known for playing Mark Healy in the American sitcom Roseanne, and Doyle, a half-demon, on the 1999–2004 television series Angel, a spin-off series of the television series Buffy the Vampire Slayer... (wikipedia)

Not to sound egomaniac or anything, but just to get under people's skin like that, and for them to believe in you and believe strongly enough to write... it's flattering and it helps you during the day.
When they first cast me, I was a pretty avid fan and vampire movies and Celtic mythology, so I was excited to get a chance to walk in Doyle's shoes and have fun with it.
As soon as I did, everything, the whole room, just clicked.
There's a lot of Doyle in me. I don't know where I begin and Doyle ends or where Doyle begins and I end.