Pretty much the only complaints I had about Clash of the Titans were;
1) Bubo is a little *too* much of a "we're trying to cash in on Star Wars"
2) Story gets less plausible in a few places, like Cassiopeia deciding out of nowhere it's a great idea to diss Thetis in her own temple, Bubo singlehandedly freeing Pegasus from the swamp people, or Medusa's lair needing "Dioskilos" as a guardian as well.
3) "redshirt" versus "hero" characters are obvious.