Good idea, maybe I'll do the same and re-evaluate my votes. I look for voices of reason who have been around consistently, can take decisions with a long-term view and without personal agenda.
I won't leave any names, as there are too few who meet this criteria right now, so I try to fill in with 30 votes. I also tend to vote for undervalued witnesses who have been overlooked due to their lack of political skills in promoting their campaign etc. As there are more such witnesses, I'll start unvoting for higher ranked witnesses whom I first voted for when they were well off the top 50. Also, non-developers, as currently things are heavily skewed towards them (rightfully so, of course). In the future I'd also vote for teams and groups rather than individuals, as they are inherently (but not necessarily) more likely to take a reasoned decision.
Great points to keep in mind, thanks!