KotOR:
- Dantooine, nice view, really peaceful place
- Korriban. nice sunset and it reminds me of a great past (Tombs of the Sith Lords), so I really like the atmosphere
- Kashyyyk, because there was a jungle-like music (hmm, doesn't have to do much with "visually impressive )
KotOR II:
- Again Dantooine, because the "greyness" of the planet fits perfect with the story, strugling of the settlers