I'm not OP, but if I had to pick a favorite exoplanet, I would pick Kepler 62f, because the planet itself is tidally locked with its sun, so, although it is in its star's Goldilocks zone, there is only a thin strip along the twilit areas that actually can contain liquid water, as it's too hemispheres are either too frigid or too blistering due to the concentration of the absorbed heat on one face of it.