I don't really have any preference when it comes to stablecoins. They're all the same to me. Though I try to avoid USDT like the plague as there have been a lot of horror stories with them lately, causing problems to traders that takes weeks or months to resolve.

USDC was good for a while, and is also good for small transfers from exchange A to exchange B, but it is recommended that you immediately exchange it to some other tokens and not keep it as it is as it's still a stablecoin wherein they can do what they want. No reports of USDC being frozen or anything, but just to be safe.