Try all kinds of hybrids and see what you like. Hybrid are all different and some are more road orientated while others are more mtb orintated. so overall, it really depends your riding style.
If a hybrid is more mountain bike orientated, it's more likely it would have a mountain bike frame style, knobbie tyres and maybe a front suspension fork.
If it's more road bike orientated it probably does have a light frame not build for "very" rough terrain. Most like will have a rigid ( suspension-less ) front fork. Their tyres are probably slicker for aerodynamic purposes.
Just look out for these chracteristics when looking around.
A good example of a road orientated road bike would most likely be the trek fx 7.5. The dual sport offered by trek is more mountain bike orientated. The trade off is between Speed/ and the type of terrain it can travel on.
Hope this helps your out a little bit.
Cheers,
Rodger