Dark City was a great movie IMHO.
Riddick movies are bit weird, i am still undecided, whether i actually like them or not. I guess i consider Pitch Black decent and Chronicles average, although there is one aspect of the that movie i really like, the whole Underverse thing. It kinda reminds me of Sins and Advent and i feel like the movie could be so much better, if this was more developed/explored. Instead it was bit of a background fluff for an average action movie.