Currently play Ratchet and Clank 2: Locked and Loaded after finishing the first Ratchet and Clank.
All in all, its a pretty decent game. Ratchet and Clank was a lot of fun, and L&L seems to have just taken the origanal game, fiddled around a bit, then release it into the wild. Not that this is a bad thing.
The major problems I had with the first game have been fixed, such as the changing weapons during battle (it now pauses the game while doing so) have been fixed. However, some problems havn't, and there are some new ones. The game is still pretty fustrating, not because of the difficulty, but because of the sometimes rediculous distance between check points.
Also, space ship battles have returned, but are now pretty terrible. In the first game ships would appear on screen, turn round to face you and shoot, and it was merrly a matter of fending them off while concentrating on not hitting anything. Now, more often than not, ships will simply tail you and fire, and since your turning speed is so slow, the only thing you can really do about it is flee.
Ratchet and Clank L&L is still a great game. Ratchet and Clank are Sonys eqivelent of Mario, just with big guns. This, coupled with some decent pixar like humor and once again, big guns, make it very hard to dislike.
BTW paasi, Sands of Time is probably my faviourite game ever. Give it time.