I grill whenever I can and even clear snow from around the grill durring the winter just to have a good burger or steak. I have a combo grill that has one side for coals and the other for gas.
Gas grills have their purpose for convenience. I would say that as far as grills go, go with a good brand like a Webber. Look at the size of the cooking grate and make sure you have enough space to cook enough burgers for your family. If you want to cook with a spit, make sure it has that option, location for mounting the parts and so on.
Side burners are important too. If you want to make a BBQ sauce or to just heat up a can of beans. Knobs and ignition are also important,. You don't want to invest a couple 100 dollars on a grill, bring it home, put it together and find that the cheap ignition won't ignite a burner or the knobs fall off.
There are a lot of grills on the market, from a 100 or so dollars to thousands. Decide on your budget, talk to your friends, attend a few BBQ's, see what they use, find out how they like theirs and then consider your needs.
Good luck, IC