>I am concerned tho that preference voting (is that the right word?) gives people too many opportunities to screw up—there are too many things that can go wrong on the ballot
Here in Australia you number the box next to the candidates name from 1 to N this is not normally an issue for the local seat in the lower chamber (house of representatives) where there are a manageable number of candidates, but in the upper chamber where senators are elected on a state wide basis you end up with sometimes farcical situations like the infamous "tablecloth ballot paper" which had 264 candidates.
There has been some attempt to reform this such as forcing people/party's to pay a registration fee in order to appear on the ballot (this is done to cut down on so called nuisance candidates but it is arguably undemocratic, although I believe you are eligible for a refund of the fee if you poll above some threshold % of votes which is a fair compromise in my opinion).
The deposit system in the UK seems to work fine for us.
It's not enough (£500 currently) to be a meaningful expense to any candidate actually trying to win, but it's enough friction for 'fun' campaigns that we get enough to be funny but not enough to really interfere with anything.
And, yeah, ours is called a deposit because if you get 5% of the vote you get it back - and the phrase "lost their deposit" to reference a candidate who thought they were real utterly cratering on election day is pretty widely known.
Of course the UK's system of government is largely a patchwork of oddities that, put together, mostly work for us, so how well any particular oddity will work in another system is invariably debatable.
Here in Australia you number the box next to the candidates name from 1 to N this is not normally an issue for the local seat in the lower chamber (house of representatives) where there are a manageable number of candidates, but in the upper chamber where senators are elected on a state wide basis you end up with sometimes farcical situations like the infamous "tablecloth ballot paper" which had 264 candidates.
There has been some attempt to reform this such as forcing people/party's to pay a registration fee in order to appear on the ballot (this is done to cut down on so called nuisance candidates but it is arguably undemocratic, although I believe you are eligible for a refund of the fee if you poll above some threshold % of votes which is a fair compromise in my opinion).