Disclaimer: This isn't me hitting on the OP, just nothing more than a coincidence... but I really like Irish girls. Main reason being the accent (hell, the Celts and the Gaels do it for me, really). It just sounds so sexy every time I hear it... Also, red hair. My hair preference in girls goes from red at the top, to brown, to black, to blonde. Green eyes and red hair are the perfect combination for me.
Basically, give me an Irish girl with red hair, green eyes, and a really nice smile (and maybe freckles too), and I'm in love...