Yeah, Half-Life's SP was only good up to the Xen part. The jumping puzzles were such a pain. The final boss is such a tedious task to defeat because you have to time practically every mode in order to beat him. I thought the ending was a slight let down at first but the ending is a lot more satisfying if you were paying attention to the Gman since the beginning of the game. All that foreshadowing all over the place made the ending make much more sense. We'll just have to see how Half-Life 2 starts off to see what kind of impact the ending had for the game's continuing story.
If you don't have it, I do suggest getting Opposing Force if you don't have it. It is a great add-on that is actually more fun that Half-Life.
BTW, what ending did you pick? Choosing "no" sure did give you one anti-climatic, yet funny, ending.
-- SavageX
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"...and if you don't like that, then you need to be slugged in the face repeatedly, until my hands are soaked in blood. Have a nice day!"
http://www.savagex.net
The cake is a lie... THE CAKE IS A LIE!!!!!