I worship the lovely Kate Beckinsale, but I though
Van Helsing was a turd. That's funny, since I'm usually the guy supporting a "guilty pleasure" type flick that everyone else hates.
First off, the effects were
horrifying! I've never seen anything that so looked so manifestly fake. Why oh why must every action film have 90 minutes of CGI? Is it a new union by-law? The werewolf effects were laughable, just hilarious.
They even ruin scenes that didn't need CG stuff. Take for instance the ballroom scene. Everything looked decent, until you look up and see the oh-so-obvious CGI characters on the tightrope. Why'd they do that? It totally ruins the suspension of disbelief to see something so obviously phoney in a scene that otherwise passes muster. I also can't fathom why they always need to use CGI to create The Unimaginably Giant Lair. Did anyone else snort out loud during the scene on the one-mile-long-but-three-foot-thick bridge
that had virtually no arches or support? When 75% of the bridge gets demolished, it
still doesn't collapse! 
WTF?
Mostly I thought the abuse of computer graphics was the flicks death knell, but the casting & script seemed weak. It had a pretty jumbled plot, all over the map. And a pretty bad ending.
I normally like cheesey bad cinema, but this one didn't do it for me.