Yeah, that's a really vague question.
Pistol, rifle, or shotgun?
Caliber you're thinking about?
Price range?
Don't forget to take the price of ammo into account when you're looking around at the gun shop. I'm pretty new to owning guns myself, but so far I've stuck to the calibers that are in use by the military/LE (22LR, 9x19mm, 45 ACP, 5.56 NATO, and 7.62 NATO. Want to get a 7.62x39mm in the not too distant future.) Ammo is cheaper and easier to find that way, and you can buy milsurplus in bulk.