Other than a flight in first class on a decent airline, I don't think there is anything more for me to aspire to.
I flew Qantas First Class a few times back in the days when it was a proper airline, before Dixon and Joyce destroyed it. Admittedly, it was still only seats back then, long before the beds came along. But the service was impeccable, and it was a very enjoyable experience. However, standards started to decline after the first couple of times.
There are two highlights of my flying which I think I have mentioned before in other threads.
I flew on Concorde from New York to London back in the 1980's. That was something I never ever expected to do in my life, and came completely out of the blue. My partner at the time used to travel a lot for his business, and I occasionally went with him. We were booked on a BA flight to London, and on arrival at the terminal, there were people everywhere. Something had happened. We went to check in, and while waiting in line, I heard the agent ask the guy in front of us if he wanted an upgrade to Concorde. When I mentioned it to my partner he said no way will we get it as he/we had no status. When our turn came we got asked, and we took it before she could change her mind! Turns out TWA had to cancel their flight to London, and BA was trying to accommodate some of their passengers, by upgrading F passengers to Concorde to free up space on their 747 service.
It was a wonderful experience, and got us to London four hours earlier than planned! I remember the plane being quite cramped inside, and not a lot of leg or head room. But at least I did it once. Didn't run into anyone famous in the Lounge prior to boarding, and no paparazzi meeting the flight when we landed in London!
The second experience came when I had used all my points to book a bed seat in F from Bangkok to London. Bed seats were still fairly new then, so I was looking forward to trying it. On boarding the plane and turning left, I was confronted with the old style seats. It was the time when Sydney was struck by a massive hail storm, and several of their planes were damaged. Sadly, we got an old plane, as the scheduled upgraded plane had been damaged.
When I was chatting with the FSD, I mentioned my disappointment at the turn of events, and although sympathetic, there was nothing he could do about it. Fair enough it wasn't his fault. However, he came back later on, and told me that the captain had invited me to sit in the coughpit for the landing into London. After breakfast and about an hour and a half out, the FSD came to escort me to the coughpit.
This I think was my most magical flying experience. The captain explaining what was going on, listening to the conversation with the control tower in London, and we could see other planes around us. Then seeing the runway ahead of us as we lined up for the approach, and started the descent. It was fantastic. Once we taxied to the gate, I left the coughpit, and some of the passengers on the upper deck congratulated me on landing the plane safely!! Always remember that. On leaving the plane, the FSD gave me a bottle of Veuve Cliqot champagne.