First you have to decide what type of Map your Wanting...
I assume since you said "set up on tabletop" you are meaning a scaled "Battle Map" with grids.
Do you want to print out the Maps?
If so what size?
Are you wanting Digital Format also?
These are questions you want to answer before you start a map.

Everyone has a personal preference in colors, grid type, art style....I prefer more simplistic style...others prefer extremely detailed maps.
Art style makes a difference also..I prefer one style art vs....Mixing artwork. Ie...If I use a Hand Drawn art pack I try and never add a photoshopped graphic if I can avoid it.
What I mean by that is that if I am using a hand drawn graphic of a Desk..I don't add a cropped photo of a Cat on top of the desk.