I liked my seat on the Singapore Airlines flight the best, thanks to the plush bedding and three pillows provided when it was turned into a bed.

My setup was so comfy that I slept soundly in the air for six straight hours.

This seat's storage options also impressed me the most. I had a separate surface to keep my drink out of the way and a spot perfect for storing my Kindle and other in-flight essentials.

Plus, the space included a built-in mirror, which was key to my pre-landing makeup refresh.

In terms of seats, American Airlines came in second for me.

I liked that the seat was more angled toward the windows, which made it feel more private than the other two.

Unfortunately, I didn't feel I had as many storage options, and the bedding felt a little less plush than what I had with Singapore Airlines.

However, this lie-flat bed setup still felt cozier than the one on my Qantas flights.

In my opinion, Qantas's bedding was the least plush of the three.

I had a tougher time getting comfortable with less padding and just one pillow.

That said, there was a really great amount of storage at my seat, which meant I never had to pull things in and out of the overhead bins during my flight.

All three airlines provided me with an amenity kit.

The contents varied a bit, but often included lip balm, earplugs, an eye mask, socks or slippers, and a dental kit in reusable toiletry bags.

I got headphones on every flight, but I liked the Bang and Olufsen noise-cancelling models from Singapore Airlines and American Airlines the best.

Who doesn't love changing into a pair of pajamas for a long-haul flight? Qantas is the only one of these three airlines to provide me with a set, and they were super cozy.

The pajamas were so comfortable that I've even continued to regularly wear both pairs I acquired at home. I'm glad I sized up, as they've shrunk a bit in the dryer.

I also liked that Qantas had a lounge area on my deck, a cozy space where business-class passengers could grab snacks and drinks from coolers.

It was also nice to be able to stretch a bit and try different seats — some even had tables.

For me, Singapore Airlines absolutely wins the food category.

I'd give the airline top marks for the delectable food presentation and a wide variety of menu options — plus every dish I ate was full of flavor.

The Singapore chicken satay with spicy peanut sauce was the most delicious thing I've ever eaten on a plane, and I still think about it months later.

I was also happy with the tasty, hearty dishes I had on my Qantas Airlines flights.

The Australian charcuterie appetizer stood out to me as a thoughtful touch when I was traveling to Melbourne. Plus, the breakfast I had before landing was quite satiating, with eggs, sausages, veggies, fruit, and a muffin.

When compared to Qantas and Singapore, American let me down with its food. The dishes I had seemed less visually appealing, a bit more bland, and not as unique.

The beef I ate was OK (although it wasn't as hot as I'd prefer), and the broccoli seemed overcooked. I think both could've used more flavor.

My in-air snack also felt pretty carb-heavy and underwhelming: a sandwich with very sparse filling served with pasta salad.

Qantas doesn't offer WiFi on international flights. (That said, a representative from the airline told me it plans to start offering it on select aircraft sometime this year.)

I was disappointed, and I didn't realize until about an hour into my flight. Although some passengers may have enjoyed the ability to disconnect, I'd been planning on getting work done.

Thankfully, the robust in-seat entertainment kept me busy.

In this category, American Airlines and Singapore Airlines are tied. Both had WiFi (although I had to pay extra for it) and large in-seat screens with plenty of movies and TV shows.

All three airlines had such impressively friendly and helpful crew members that the service category is a complete toss-up for me.

The Qantas crew offered me a guided tour of the airplane, including a peek into the first class below (business class was on the upper deck) and a secret set of stairs.

The Singapore crew saw me struggling to transform my seat into a bed and quickly stepped in to take care of it.

A member of the American crew noticed I was drinking a lot of water and brought me a huge bottle to enjoy for the rest of the flight, plus a second one to take with me.

Traveling with Singapore Airlines was a bucket-list experience that exceeded the expectations I'd built up in my head for years — the flight attendants, culinary program, seat, and entertainment were all top-notch.

To date, it's my favorite business-class flight and airline, and I'd jump at the chance to fly with them again.