I recently purchased Hot Shots Golf Fore! for the PS2, and I love it. Upon my first 10 minutes playing it, I had the distinct feeling that I may have to abandon everything else in my life and just play this game untill I die.
I was a fan of Mario Golf for the Gamecube, and I noticed that it was very similar. Turns out the same people are behind both games.
I like that the golf physics are realistic, but the characters and caddies are really funny. Its the best of both worlds.