I have just spent the last hour writing a essay comparing Mercutio to Romeo and it hit me how much these two have in common with Angel and Spike. Mercutio is the loveable rogue who sticks out in his scenes and doesn't really fit (like Spike). While Romeo is the romantic guy with a good heart and takes action when needed (like Angel). You could even compare Bangle to Romeo and Juliet (with the whole Vampire thing taking the place of the two waring families). I'm not sure if this makes sense but thought I'd just put it out there.