I like combo press/zone defenses. I like triangle going with a 2-3 base, and flex with a 3-2 base.
FB/press is very effective, especially at lower levels, but it’s less fun if you like to coach (can’t slow down, can’t double, harder to exploit positional advantages). You have fewer options, and you’re pretty much letting others take their best shots against you. But it is pretty strong, if you’re able to consistently get the personnel for it.