In reply to dunnyg:
Cwm Idwal has lots of easy routes such as 'Hope' on Idwal Slabs which can then be linked with easy routes on the walls above such as 'The Arete' on continuation wall. If you are still feeling good after and have time you can link 'Sub-Cneifion Rib' & 'Cneifion Arete' as well.
The east face of Tryfan also has several great routes at VDiff & HVDiff - Look at 'Gooved Arete' though this is about 8 or so pitches.
There is easy stuff on Little Tryfan - most if not all the routes are very easy and can be done in one big 50 or so meter pitch.
Flying Butress & Spiral Stairs on the Cromlech are also great multipitch easy VDiff's.
If the mountains are wet and miserable then there are several really good VDiffs and severe's at Tremadog which is often dry.