I played Lost Pig five years ago when I started playing interactive fiction. I remember thinking that it was a wonderful, wonderful game. I loved the humor of the PC, the silly idea of chasing the pig, the contrast of me with the gnome, and the interesting color puzzles.
However, whenever I go to revisit it, I quickly lose interest. The puzzles were fun the first time, but I find little replay value in the game. If you strip away the narrative voice, the puzzles are only slightly above average.
I recommend this game for everyone to play through once, though. The gnome NPC is brilliant. The color puzzle is fun.
Overall, I found To Hell in a Hamper funnier, and the Rogue of the Multiverse. I think this is a great game, but I wouldn't call it the best of all time, as some have.