As long as you are consistent between the score and the review from the game,a score can be nice.But i rarely see them done well.

You are taking a selfish approach to review design.
You did not consider me: your dear reader into consideration when posting...

You Repugnant...

Me too, my review is now out of twenty.
Take that 3/20!

Okay; okay.
On closer inspection I have found it to be unfair to review a game a 3/10 due to the quality of my time with it.

I retract my former statement; effective immediately Fire Emblem Warriors is now a: 3/10 game.

Scores don't mean shit......

unless they are perfect of course.

I think review scores are only useful when considering a variety of different reviewers with different tastes, and knowing what the tastes of the reviewers are.

For example, if five RPG/strategy centric reviewers give a game 10/10 each, and then five action centric reviewers give the same game a 6/10 each, - the average would be 8/10, which most people would consider the game’s score - but this isn’t actually useful. I like RPGs, so the game isn’t likely an 8/10 for me, it’s probably a 10/10. If there was only one reviewer, and he/she scored it 6/10 because they like action games, that review score doesn’t accurately represent the game to me.

Anyway, what I am trying to say is averages are useless, what is more useful are categorized scoring.
Metroid for me might be 3-4/10, but for others 10/10. And Dragon Quest might be 10/10 for me, but 3-4/10 for someone else.

So I don’t really think they’re useful in a singular sense.

Review scores are just an easy way to assess a game based off an easily observable quantifiable metric.

Review scores essentially allow you to rank a game against other games, while evaluating it on it's own merits, and show it all in one easily identifiable number.

At least, in theory it does, but I feel like in practice this rarely ever works, and it's often to the detriment of the reviewer to have them in the first place. I think distinguishing between what score to give a game based on it's own merits, and ranking it against other games you gave a score, can be nearly impossible and it's why I think sites like IGN usually are very liberal with some games and stricter with others.

I won't go into a huge spill about why I think review scores are a slippery slope, but I think they can be detrimental and also useful. I like to use scores, but I have my own scale that a lot of people don't follow. However, I don't think anyone will slight you for giving game x y score. So ... might as well? Lol