Hoth for K1 (since K2 kind of has the polar region of Telos if you wanna count that).
There's just something that kind of interests me about seeing well known Star Wars planets set thousands of years before the time you see them. I like Tatooine and Kashyyyk for that.
In Kotor 2 I want Coruscant, partially for the same reasons as Hoth, but also because I feel like it would be very unique. Yeah, K2 has an ecumenopolis already in Nar Shaddaa but I think it would be cool to see Coruscant in the absence of Jedi. And how the Exile would be treated, with wanted posters of them all over the city.