The third section of "Belfast Hornpipe", with its predictable and tedious descending triplets (diddly, diddly, diddly, diddly, diddly, diddly dum) soils the first two parts, which are just delightful.
Another sub standard Irish tune is the B part of "Victory". It sounds like something you play until you remember the real tune.

The Irish have a genius for sprightly melody. They, also, have they infernal ability to play the same song for hours.