I thought God of War 1 was awful. It bored me so much I stopped playing about half-way through. The gameplay felt ancient even though it wasn't even that old when I played it. (about 5-6 years later)
Thankfully the PS3 collection included the sequel and that one was so much better even when it was obviously held back by the PS2. Really enjoyed it nevertheless.
God of War 3 was on a whole other level though. Truly epic.