We can cast a maximum of 40 votes (up/down) per day¹.
For people who vote a lot — which is encouraged — this maximum can be reached pretty quickly. I know why there's a maximum — we wouldn't want a users to indiscriminately vote on everything — but 40 votes is not a lot, and the fact that it's a daily limit makes it much lower due to the days we don't hit the limit.
There's a Stack Exchange site that I visit pretty regularly, for the most part once per day, and where I very often run out of votes. On average over a week, I vote about 200 times — but per day, the number of votes I'd like to cast varies from about 20 to about 60, because of the variance of quality (plus week-ends have fewer posts). And that's only if I manage to go through questions every day: if I miss a UTC day then I lose that day's votes.
Please make the vote limit a rolling limit on a longer time basis. 40 votes per day amortized over a 7-day period would be good.
Related: Votes should be provided slowly over time, rather than all at once — but doing it that way would hurt me a lot, because I usually visit the site once a day and browse that day's posts in one go.
¹ With additional restrictions related to the number of votes on questions, and we get votes back from deleted posts, but neither matter here.
