If you're a PLAYER, perfectionist or not, that means you are PLAYING the game. Try LIVING it.
Imagine yourself as that little @ on the screen, holding a bronze shortsword and clad in rope reed 'armor'. Now, you see a creature you've never seen yet, with a rather menacing description (once descriptions are in, for now a "giant cave spider" seems menacing enough, you just don't know exactly HOW giant it is), and seeming Mighty to boot. You see yourself as Agile and Tough. Would you expect yourself to go blindly charging the thing, or flee to return later, with company? You are completely on your own if you've only the description - that's living the game. You cab hope for luck and charge, you can throw some rocks to soften it up, you can form some kind of strategy regarding its weapons - like grabbing a bowman's bow for example. When you have numbers and things easily comparable - you'll be playing the game, making decisions an ingame character would not have made, like seeing that the mighty goblin is in fact 3 points weaker than you and deciding to take him on - while you would hesitate otherwise, and try to do something else.
Of course, there's hardly a reason to call devoted players "livers" (heh), but the concept is that in a game of numbers, numbers will rule. You shall always race for bigger numbers, disregarding natural playstyle. As long as DF is a game of descriptions, of story-telling, it will live as the greatest RPG ever conceived.
You know, I've recently played Diablo 2 to recheck my feeling on that one. Despite it being, ultimately, a game of numbers - for the player character - the fact that you don't see exact hitpoints and stats of monsters seems to support the game's atmosphere a bit, just enough to stop it from becoming an all-numbers game. A necromancer feels just right, I never keep track of the damage I or my skeletons do, I just try to enjoy the bloodfest we make together. For a game unsuitable for roleplay, D2 can be a little forgiving when it comes to that. It doesn't stop me from being wiped out by the demon in TalRasha's tomb though. Note: if I knew that thing's stats before I met it, I would never attempt to kill it until I was an order of magnitude more buff. That's playing the game. I tried to live it, and had to learn on mistakes - that makes it fun for me.
Also, in relation to the numerical system being popular - it's easy to do, and supports the gameplay by pushing the player to get the highest numbers. It's like Starcraft - the gameplay principles are so simple it isn't funny, the design's been copied over dozens of times, there are billions of players all over the world - but Total Annihilation's gameplay is still superior, both in possibilities and "advancedness". Anyone can make a game on hitscan projectiles, and anyone can play that game - but try real ballistics for a change, they are better and no less fun.
[ November 07, 2007: Message edited by: Sean Mirrsen ]