Me, too. Haven't ridden as much due to work and family -- but rode a bit more this summer with my son.
A cyclocross bike is a good hybrid; it's a mountain bike with a little more roadie stuff to it because it's meant to be carried at times. Personally, I still ride a true MB, hardtail. You don't need the newest, fanciest stuff -- but you DO NEED A HELMET!
Get to know your Local Bike Store (LBS). If they get to know you reasonably, they'll steer you straight. And they can probably hook you up with some local rider groups, like
MORE in the DC area. These groups set up rides and are great resources...