I dont have a garage, but If I did, that would be my entrance, and I would expect guests to use the front door, which has a porch and a path from the driveway where guests can park (and where I park).
My house has a front, back and side door. That is not very uncommon here. Though since my neighbor uses her back door exclusively (due to parking in the back) and my other neighbor using their side door exclusively, I wondered if the front door was something anyone would think to walk up and use? It seems to be common sense for me to walk up to someones front door say if I was delivering pizza or girl scouting. Haha. But alas, everyone has their preferences and reasons.