I tend to prefer long term sessions with more story and character development versus powerhousing, though is a fun break to do short quick sessions here and there.

Yeah I get that, I once ran a Legend of the 5 Rings game for 5-6 years. Everyone had a blast and despite many many maulings (a arm turned to Jade, A arm removed via demon spider) all 5 players (yes one was Alyx) had a blast. I only racked up a single killed player (which was actually upsetting as it killed the party dynamic)
Some sysems run better as a long form, apart from the above system, other ones are Roque Trader (warhammer 40K), Shadowrun 2nd - 3rd Edition (It's fun being in the region of 300+ Karma and still doing challanging runs) , another long term game I tried to run twice, and had to truncake the ending due to a player death followed by said player just wanitng to cause trouble was a Mechwarrior game that I set before the Clan wars to build the players into a decent merc unit that played a major role in the background lore (and this was before Mechwarrior 5 was even a dream in some programs mind)
Games I'd still like to run at somepoint kinda fall in the middle are Earthdawn as due to how the 'magic' items work, a campain can be based around unlocking a single item, the Star Trek RPG and a hidden even in histroy (TOS based timeline) but it's finding a way to run them.
The local gaming club has a limit of 20 week sessions, and is frankly inbread with people who think Critical Role style games (smug. sex obsessed twats with tragic backstorys) are how you do it