Been anywhere amazing?

[waitressvn]

I am travelling to Ireland at the end of November with a friend, we are both 24yr old Australian women.
The plan at the moment is to hire a car in Northern Ireland and then drive to Ireland and around the country for a week. Obviously there is way too much for us to see and do in a week so I was hoping someone who has been there before could recommend a few particular spots?
We are going to be staying in hostels it would be good to know any particularly fun and lively ones.
Thanks