#3 Dublin male singer with guitar. I really like this one.
#4 Dublin male singer same one as in #3?), Paddy's Shamrock Shore (not the same song as Kat's link above- never heard this one before.
#5 American (Southern?) accents
#6 fiddle(s) & mandolin with guitar accompaniment- doesn't sound Irish, very nice reel playing. I know the names of 2 of the 4, but blowed if I can think of them now.
#7 Very interesting close harmonies, Irish and american accents?
#8 was unobtainable.