Thanks for the welcome.
As to ferrys.
It depends on where I'm going, and the time frame I have
I have used most of them over the years.
Mostly Belfast to Stranraer HSS or Dun-laoghaire Holyhead HSS cuts out the M6 Birmingham jams if heading to England or the chunnel.
Rosslare to Fishguard I have used but it's not as handy as Holyhead.
Depending on my timings I have used Belfast Berkinhead. It's not the cheepest but you get a nights sleep and all you can eat.
You can then be in Dover for lunch.
It all depends on the reason, direction, and best deal at the time.
Shop around, motorsport travel, or nutt travel usually offer the best deals.
But not always.