i'm heading to ireland!

i'm heading to ireland in a little less than a month with some friends and couldn't be more excited! my sister's been to dublin and has recommended a few spots, but i need your help! have you ever been to ireland and if so, what are your favorite spots? we'll basically be hitting all the major cities, dublin, kilkenny, kilarney, etc - if you have an recs, send 'em my way! any and all will be greatly appreciated. thanks friends!