I tend to tip more than average, though I usually consider small counter transactions (like a $3 coffee) to be worth a 15% tip max. I don't like when the kiosks

I tend to tip more than average, though I usually consider small counter transactions (like a $3 coffee) to be worth a 15% tip max. I don't like when the kiosks are configured to either not have 15% as an option, or make it look like the bare minimum. I do feel that social pressure from the people behind me or the cashier to tip at least 20% which is the middle option on some of these, or on some even 25%. Those I feel are often quite high for the level of service.