Count ports with room to grow
Buy for the devices you have plus a few spares. TV stands and desks often grow extra wired devices over time.
Gigabit is still practical
A gigabit switch is enough for many rooms. Multi-gig matters when internet, NAS, or client devices can actually exceed gigabit.
Fanless matters at home
A switch near a desk, bedroom, or TV should stay quiet. Fanless metal models are usually easier to live with.
Smart features are optional
Easy smart switches can be useful, but unmanaged switches are simpler when you only need more ports.