I'd avoid Boones and Thunderbird unless you also enjoy d
The sort of wine you had in the past might help give you an idea of what you might like now. I drunk small amounts of wine at Thanksgiving, etc, since at least my high school years. And then, I found myself liking red, instead of white. Although, I'd take either. At seventeen, your options are generally limited, and I didn't figure I could argue. Today, I can say that I have found white wines I like. But I definitely have a strong bias towards red wines.
I also suggest Riesling. Lambrusca is worth considering, too, although that's a wine that some wine snobs, er, connoisseurs turn their noses up at. But it's approachable, and my attitude is that there is a time and place for everything. Except, perhaps, furniture stripper in a wine bottle.