Always coffee to start the day, usually Bustelo brewed in my Aeropress. Cheap coffee, but I love it, especially brewed strong.
After that it varies.
For beer, I'll alternate between a low alcohol/low calorie beer and water. I just finished up a case of Miller 64. Going to try Budweiser Select 55 next. I
much prefer craft beer, but the caloric cost of pounding those down is too much. I do have craft beer aboard but the selection always varies. I try for beers in the 5% ABV range. Right now it's Bent Paddle Brewing's Kanu session pale ale.
For spirits, it's hard to beat my wife's G&T's. Call us low-brow but my favorite gin is Kirkland gin from Costco. And always fresh limes. One of the best things we bought for the boat was a lime squeezer. Last year I frequently made Dark & Stormy's, but grew tired of them by the end of the season. My wife likes making
Bootlegs and beer margaritas. I love her Bootlegs but find margaritas too sweet for my taste.
Oh and wine. We sail on Lake Pepin and last year we found a line of wines called "Le Pepin" at Trader Joes. It's not great, but it's pretty good for the price and it's kind of neat to serve it to guests. We bought a case of chardonnay and a case of pinot noir and we're just about out. We usually have a boxed chard or pinot grigio in the fridge and special bottles come with us from time to time.
After the sail is when I break out the bourbon. Lately it's been Buffalo Trace because it's the only reasonably priced bourbon at the liquor store by the marina (and I quite like it), but I'll bring special bottles from time to time if I think our guests would appreciate it, such as Stagg Jr., Maker's Cask Strength or EH Taylor Single Barrel.