First of all no feature actually makes me trust a wallet like that.
The choice of a wallet actually depends heavily on what I intend to use it for, for long term purpose you would see me looking for an airgap wallet which is open source. The airgap simply means I can actually sign offline transactions too. For short term hold I can have hot wallet
As for security once a wallet is actually open source the security depends on me like how I treat its back up. Then fees, there are no wallet with lower fees to say, rather the choice is wallet that can allow me to switch server either to connect to a public one or mine. Then should be able to allow me to customize fees.
Then I prefer wallet that gives the option to add a passphrase too.
1. Have you recently tried a new wallet?
No, I haven’t because I have most features I needed on the current wallets I use.
2. What is the first thing you check before trusting a wallet?
verify the source code
3. Which feature is most important: security, privacy, convenience, or low fees?
all except that their is no low fees rather fee customization
4. Do you prefer open-source or closed-source wallets?
I think majority wants an open source even those who are not tech savvy to understand anything about the codes.