I love match 3 games! All three PQ games are excellent, each for different reasons. All are must-play titles for anyone fond of RPG/puzzle hybrids. I have 1 on the PSP and Xbox Live, Galactrix on the DS and Xbox Live, and 2 on Live and my phone.
Although there are some bugs, Might and Magic Clash of Heroes has somewhat similar but still distinct gameplay and is quite worthwhile. I think it is available on mobile still.
These are more fast-paced, but there’s always 10000000 and You Must Build a Boat.