| Overall, KOTOR1 Korriban. Partly because I'm Sith, but also because it includes a good variety of quests and events, with a good variety of outcomes, some nice puzzles and roleplay. Also, unusually for KOTOR1, it's fairly compact; there's none of the endless running from A to B which characterises some planets, notably Tatooine and Kashyyyk.
In KOTOR2, strangely, I like Peragus best. It's a genuine challenge (later in the game things get way easier) and it takes genuine care and attention to get to level 8 before boarding the Hawk.
As for worst planet: Malachor V, hands down. Did they remember this was a ROLE playing game, not a shoot-em up? |