I will give my tuppence. I went for a mini tour in November last year.
Any of the coast roads are absolutely amazing. If you head for the Southwest of Ireland then it tends to be warmer, sunnier etc because of the gulf stream hitting those shores. Accomodation is plentiful, and you shouldnt have a problem if you drop onto the back roads, it seems every other mile there is a B&B. Dingle & Kerry peninsulars are stunning, but busy during the holiday season, I would recomment the Burran (sp?) and the Cliffs of Moha (sp?) on the way up from Kerry to Galway
Dont worry about the bad roads, as Ireland has had a lot of EEC money poured into it recently, so unless you are heading down a single track road then they have usually been re-surfaced.
They are also building new motorways, so you will drop onto a new road for one junction then end up back on the road you were on and only a couple of miles down it. BUT dont trust the milage signs, you will be told that Cork is 50 miles, 40 miles, 48 miles 25 miles and 37miles in that order! Saying that about new roads being built, there are a few roadworks and missing road signs, I found that picking a busy ish route roughly in the direction I was going until I saw another sign works. Watch out for the ramps of tarmac as they are re-surfacing, as they dont put signs out like they do here.
I was given the following advice by two Irish bikers on the ferry:-
Irish drivers are not bike aware, so make sure you can be seen, and they dont always look when doing any overtakes etc! Trucks will sometimes move out of your way to let you past. If a car does, it doesnt always mean for you to pass, half the time the driver is just aimlessly wandering round the lane.
Filtering is legal, but you will get pipped as the Irish driver seems to think that it is very rude and dangerous. They are not blocking you out of spite, they are just trying to save you from an accident.
Its best to wear Hi Viz as every little helps. Irish drving standards are terrible!
All I will say is, yep, I agree, and thanks lads but couldnt you tell me that as I landed not as I was leaving Ireland
Most of all I would say the most important thing is not to rush, the Irish people are extremely hospitable, stop and chat a while, ask the locals for recomendations as you get a cuppa, you will have an absolute blast over there.
Oh and dont drink too much Guiness, it does strange things to you if you are not used to it. And I am saying no more on that point.