This is the most common question. The answer is individualized, and requires answering some other questions. For instance, how many people will the buyer be boating with? The boat must have that capacity.
Next, is there an activity that takes precedence for the buyer over others, such as fishing or wakesurfing? Most boats can serve multiple roles in a pinch, but a real enthusiast will want a boat designed to help them make the most of their primary activity.
Next, ask yourself whether you will need to sleep aboard the boat? Not everyone wants a cabin, and with no living space, room on deck is maximized. Of course, some boaters like a respite from hot sun, cold or damp, and for them, shelter might be welcome, even if sleeping aboard never occurs.
Ask yourself whether you will be trailering the boat? For one thing, the boat selected must not exceed the trailering capacity of your car or truck. Does the boat need to fit in a garage? How long is it on the trailer? How high?
Selecting the right type of boat takes some soul searching and, preferably, some time spent aboard friends’ boats or rental boats to help narrow down the features wanted.