Hiikaru
Run.
- Pronoun
- he
That's true, but I don't think a few sentences is really sufficient for more than a drabble, in general.
Regardless, in this hypothetical point system, I don't think the points should really have anything to do with your quality. I mean, sure, an accurate and detailed review is certainly better than someone who's just saying the same thing and padding it to get more points, but I think that length is much easier and fairer to judge. Five paragraphs=five points (or whatever) is fast and there can be no qualms about fairness, because everyone is treated exactly the same way. Besides that, who wants to tell you that the review you spent two hours on sucks and will only get you one point? It wouldn't be fun to run the system that way.
Additionally, you should probably write a review the way you would prefer that someone else review your work. If you're perfectly happy receiving one paragraph reviews, then there should be no problem with you writing them that long. But you can't do that and then expect people to write lengthy and detailed reviews for you.
There could be something like forum karma in place where regular users could also give you points, and this would be based on how much they like it, or in other words, on quality.
A point system based on length of both writing and reviews rather than quality saves hassle and prevents abuse.