I start off sitting like normal, but I only have a regular desk chair since my room's too small for a better one with support lol
Over time I end up sitting like a crosslegged or with my legs up on my secondary desk, usually the latter since I find it really comfortable to have my legs up anyway.
I usually sit crosslegged when my dog wants to sit on my lap, though.
...
...So it's usually that one often. I'll deal with leg cramps, but my dog's comfort comes first