Normal on our first arrive day we head straight to the park around 6pm. We always have a hot dog and fries from the stand in Frontier Land and grab a spot for the parde. Our first "meal" is always breakfast at CM the next morning.
Tradition thru the years has us going to FW, Crockett's Tavern, for a pizza and pitchers of beer, evenings to settle in, ,then back to WL for our welcome home nightly swim.
We tend to do something different every year depending on the situation. The last two years we have arrived the night before our package started so we ate outside of the parks both times (Boma and Cape May).
We always eat at CityWalk (Emeril's) our first night in Orlando since we don't waste a park day since we usually can't start at the parks until 4:00 or so and we were up extra early. Our first meal at Disney depends on if we arrive on Sunday or Monday. If it is Sunday, then we eat at The Plaza Restaurant. If it is Monday, then we eat at Flame Tree Barbecue (although after eating at Yak & Yeti this year it would be Yak & Yeti from now on).
We typically do CM or CP. I've found if we don't do both during the trip someone is heartbroken going home. Put one at the start, the other near the end, and everyone's happy