To be honest man, Dublin is cool, but it's a tourist trap. You'd be better off staying in one of the counties surrounding it and just go there during the day.
Now, things might be different in a year or two, but I've been hearing a lot of bad stuff recently about it. I only go to Dublin when I need to because it's not the way it used to be.
In saying all that though, you might love it and have a great time.
That’s really good to know about Dublin, thanks! Killarney kind of had that same touristy vibe for us. If I had it to do over again I’d probably want to stay in the countryside outside of Killarney. There was so much to do right around that area.