What's the difference between a nice guy and a good guy to you? ?

[Hellraiser1984]

Being nice is an act for a lot of bad guys. So if a guy is genuinely a good guy is that more preferred than a nice guy who is really a dick.

[Avicenna]

Nice guy can mean "doormat" to some people, good guy implies being a stronger personality than that

[SiberFox]

Be kind but take no shit.