For general Governance voting:

While again, it would be based on trust, I would think no one individual should vote more than 10% of the outstanding votes, and furthermore, they should never vote more than 5% of the outstanding votes "no".  This is because they must win by 10% margin of nodes, makes it far easier to spoil a vote than pass a vote.  I'm lukewarm on if I'd be in favor of limiting votes for one's own proposals beyond a 5% quantity of outstanding votes, as in the future I'm of the belief the percentage of nodes that vote will actually go down, and prohibiting voting on your own entirely is a very high bar if you happened to hold a significant number of the normally voting nodes.