After being away from the sport for many years, I re-entered it (about 6 years ago) with not really knowing what type of riding I would be doing. I purchased a hybrid bike (Trek) and started riding. I soon realized that I was looking to expand my riding experience and after much thought (and riding MANY different types of bikes), I made the decision to purchase a road bike. Best decision I ever made!!!! For me, there is nothing like riding a road bike. The position that you ride, the feel, the lightness of the bike....... that was definitely for me.
I ride mainly on paved trails, not on the road (well, 85/15). I have what might be considered an "entry level" road bike (Giant OCR-2) and love this bike!!!!!
The only advise I could give, is to ride as many different types of bikes as you can (road, cyclocross.....) and then decide which type (and brand) "feels" right for you.