I will not see E.L.F because that's the dumbest movie title since "Jeepers Creepers".
Reign of Fire I did see, and it was "ok".
I was really impressed with Matthew M's performance, and primarily at the months he must have spent in the gym to look like he did. I didn't think much of him before as a character actor(he was good in A Time To Kill as the leading man, though), but this role was great.
What I didn't like was the approach taken with the Dragons. I would have liked it more if they'd used the Jurassic Park/Godzilla(1998 American version) approach to the giant predator, not showing them until the most critical moment of danger. Reign of Fire was far from scary and really didn't bring out how monstrously powerful the Dragons were like Jurassic Park and Godzilla did.