Halo 2 vs Half-life 2

For some reason, a lot of people were very disapointed with Halo 2.  (I think they thought it would be Halo 1.5 and overhyped their expectations.)  It seems most of the people who go around saying Halo 2 sucked say Half-life 2 is by far superior.  Even though I mark up all such comments as mastabatory self-praisal by PC fanboys, I'm still wondering.  Why should it be better than Halo 2?  Halo 2 is damn near perfect, if you ask me.  Some of the multiplayer issues need work, but that's more of a gamer issue (quitters, cheaters, whiners) than a gameplay issue.  All I ever hear from the Half-Life proponents is that it totally kicks Halo 2 in the ass.  Yet they can never come up with a reason why.  Anybody want to share?

I myself haven't played Half-life, nor do I have any desire to.  Halo 2 fully satisfies all my FPS interests.  Not that I don't think it's a good game.  It looked okay, and probably is fun to play.  But I have yet to hear anything good about it.  What does it have?  Better graphics?  That I can answer myself: NO, unless you have the absolute brand new top-of-the-line PC.  But what else?  Innovative play?  Balanced weapons?  Greater freedom of movement?  Better controls?  Adam West? 

Tell me soon, or I'll think everybody who likes Half-Life 2 is just a fanboy who just sucks at Halo 2.

Only console FPS I liked so far was Timesplitters, mostly for the weirdo touches like lighting yourself on fire and collecting health powerups while igniting everyone else, the wacko characters, and some nigh-impossible challenge stages. I'd let whoever made a UT conversion take me in the ass with a spiked dildo if they ported it. (I failed miserably myself, I made three halfway decent models, {Ash, Chinese Chef, and the float alien} but was disheartened by being unable to rip sounds from a PS2 dvd, not to mention I kept botching the death animations. I'm just not experienced enough to port it.)
The rest aren't as hectic and don't have enough things to try and unlock.