The first thing I ask is whether the floor stays bare or goes under flooring, because that changes the job. A bare floor gets more finishing passes since you'll see it and walk on it. A covered floor needs less polish, but we're extra careful with the vapor barrier, the plastic sheet under the slab that keeps ground moisture from coming up, because tears in it cause trouble later.
Before the pour, I go over the joint layout with you on site. We decide together where the cut lines run, so they line up with walls, doorways or where cabinets will sit instead of crossing the middle of a room you care about. It's a short talk, and it saves a lot of second-guessing once the concrete is down.
When a budget gets tight, people usually want to cut the prep, because nobody sees the base on pour day. I go the other way. The subgrade is the dirt and packed stone the slab sits on, and a base that's only raked level settles with the ground and takes the floor with it. I'd rather spend on digging out and packing than on a fancier finish.
A floor job often comes with work at its edges. If the room has an outside door with a step down to the yard, we can pour new concrete steps at the same time. If it opens onto the pool, we can plan a concrete pool deck along with it so the heights match and water runs away from the door.