The Royal Irish have a very good reputation. Anyone I have spoken to rates them very highly. Give one of Capt Doug Beattie's books a read. Both An Ordinary Soldier and Taskforce Helmand are great reads. Depends on what you want to do at the end of the day.
Oooooops. Just realised where this is posted. Still the Marines, but good luck wherever you end up. With the Marines you get to be in the Navy only with a proper uniform, you have to buy your own ipod.
My squadron (63 squadron) played enemy (Coe for) for the royal Irish on ex Askari thunder in Kenya. Every attack we had with any of the company's, we took half of the company out. Bearing in mind we only had two sections defending a enemy post. But other than that, they are a good bunch of lads! I wouldn't say there ally at the best of times.