DB's got a pretty lame accent that he doesn't really always keep. I think in season 4 he reverts to who he was before he was vampified in his teens and he wonders where his accent went. DB probably said "Okay okay I get it, I sound like I'm the fuckin' love child of Lucky Charms! I'll stop. But I'llll still get me pot 'o gold aye?" Joss: David... no. Just... no. Just do it straight. Go home, watch Darby fuckin' O'Gill and the Little People and Trainspotting. Then come back and maybe you just might not sound like a total tool that people will be complaining about 5 years later on some Internet message board."