What are your most favorite worlds to visit to in Ratchet and Clank: Up Your Arsenal?
It's actually hard to pick one because I do like a lot of worlds in this game. So, I'll just name the ones I like the most.
Station Q9 - Annihilation Nation - It's a Stadium with a variety of battle and jumping course challenges. Even if most of them are easy, but they are pretty fun to do.
Aquatos - It was fun doing this level. You get to find sewer crystals in a huge pipe maze (even if you may have to return back to this world to find the rest of the crystals) and you get to tag along with Skidd in your first visit. Even though he doesn't do too much, but I just like Skidd McMarx so much.
Obani Moons - Obani Gemini - I just like the vibe and music in this world. It's pretty relaxing and fun despite that it can be quite confusing when you first enter this planet.
Kerwan, Metropolis - It might be my least favourite Kerwan city design in the Ratchet and Clank series overall, but it's still a great and bright place to enter to.
Aridia - In my opinion, it's one of the most fun a epic world that has the Galactic Rangers missions in them. I also like the music in this world too.
Koros - It might be pretty linear, but at least the world has quite a long gameplay duration to explore in. I definitely like wrecking all the tables and furniture that's lying around outside.
Starship Phoenix - It may not be a world, but count darn it, it's still a great place to visit to. It has Qwark-vid comics for crying out loud! Plus I do like the epic music that plays in the Phoenix as well.
and I think that's it.
What are your favorite worlds in UYA?
(strange dictionary) simple architecture of city. Bronze cupola or dome (my bad english) make some relaxing atmosphere. Why they dont build small copy of Metropolis in someone trade center? If i'm right, look on the level's shiny detail. Ratchet seems preety with thats lights, this is good effects - slowly change bright of colors in weapon detail, cities architecture, just look on the Clank's eyes. That effect give some uniqie atmosphere of game. 
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