Being off-topic: I plan to travel to Ireland the spring (from Switzerland). Do you have suggestions?
What would you like to do?
Then you roll the dice, if you get a booking (most boats leave from Ballinskelligs, Co. Kerry) be prepared to be thwarted by the weather, sea conditions can make for a hectic swell all the way out there and it's not uncommon for sailings to get cancelled as a result. I think I got out there on my third attempt.
Worth trying though, it's a magical place.