Representative democracy with easy recall of politicians by ballot initiatives, market socialism by extreme restriction and regulation of joint-stock corporations (rather than a total ban due to various edge-cases in which they may be useful), some nationalized industries, wealth and income caps, ranked-choice voting, unicameral legislature, a weak judiciary, weaker executive branch, and a centralized law enforcement system held to a higher rather than lower standard than the general population. The last one probably puts me in conflict with a large number of leftists, but I've seen what local enforcement looks like, and I've not been impressed.
I would have to really resist the temptation to let my inner burgher shine and writing in something to restrict the representation of rural areas though.
No one hates rural areas as much as someone who escaped from them.