I've played every DnD version, and Savage Worlds (twice, long ago). I own Level Up and 13th Age and PF2e and a few starter sets of other games.....
I'd like to try new games, and one idea is.......My party ends up in Sigil (they've chosen to follow a Nothic and Neogi thru a portal), and every time they go thru a new door, they go to an alternative universe where the world is just a bit different. So different, we run a different game for 2-3 sessions to learn their new powers.
This would require me to roll up (for the first world anyway, as a surprise) three PCs above level 1, and to learn new systems (at least enough to run a game). this would be online, as we are in different states.
While I think it would be interesting to run a rogue in 4-7 different systems, I'm not sure I have the bandwidth to learn that many systems. This isn't my only hobby....