4 flush with a 3 suited board

[El Cuchara]

Pot odds first, i would say. then the texture of the flop.

Technically, if you don't have the odds for the draw, texture, aggression, etc. doesn't matter. Even if they are maniacs that are capping all the time, pot odds are constant, 4to1 is always 4to1. so if there are 4 maniacs and you've got position, they would make it correct to call all the way to the river, if i understand correctly.

I guess maybe second would be implied odds. If one of these aren't +ev, than you shouldn't call IMO.

and then i guess which card you're holding. I'd say top 3 or 4, depending on reads.