hows about another type of music as well,my blues is really bad.
I think you'd be surprised at the ones you already know ... anything based around this pattern:

is a blues song, (where I=G, IV=C and V=D ... or I=A, IV=D and V=E would be blues in G or A respectively) and sometimes it's more the feeling of the song, like some of Bob Dylans songs sound bluesy because of his voice.
Cheers
Richard
