Small children and time. No work on your part at all (except raising the children - easy stuff). The drawback is that you don’t necessarily get to pick the final stain color. You can influence it, however, by providing them with only one color of food, drink, and markers.
I usually use commercial oil based wiping stain from an industrial coating company in town that will do stain matches for us. I also use off the shelf products from Minwax, Varathane etc. They all seem pretty similar in use, stinky and somewhat messy if you are not careful. I use paint rags or a cheap coarse brush for application and throw out. Disposable gloves, clean up rags and hand cleaner close by make life easier. I don’t find the drying time a big deal, and oil stains are easy to work with when doing a difficult match. A wet rag will remove a surprising amount of stain if necessary.
Haven’t worked as much with water based stains but when I have they seemed fine. Some people don’t like the short working time. Grain raising can be a problem.
Have heard good things about wood dye, especially for blotchy woods but have not had a chance to try them. I think stain and finish in one products lack flexibility, what do you do about that nasty fingerprint that didn’t take stain? Danish oil is the exception to this rule as it has an extended working time.
I don’t think of gel stains as particularly easy to work with, and the colour pallet is pretty limited. Only thing for fiberglass or plastic entry doors, or any other non porous faux wood surface though.