I hate when games are realistic.
Rather, I don't enjoy games that make an attempt at simulating realism in place of the experience the game actually wants to provide. The question for a game isn't whether or not it adequately presents a feeling of realism. The question is whether an element of a game believably represents the type of gameplay the designer wants to impart.
"Is this what the game's about?" in short. It doesn't have to be the crux of the game, but the element has to serve the play.
If the game includes chupacabras in the bestiary, that means the designer wants you to fight a chupacabra when you play.For example, I have always been frustrated by the inclusion of the Computer skill in the various World of Darkness games. The fact that the rules support a specific sort of challenge involving the use of computers, in my opinion, sends the wrong message. That message is, "This is a setting in which people who use computers are a significant facet of the setting." All of the sudden you open the floodgates of things like vampire hackers, cyber-werewolves, and the sorts of loosely computerized tangents that occasionally rear their heads on things like CSI. Never mind all of the trappings of gothic literary fiction and the turgid emotional landscape of eternal living death -- it's time for a shadowrun.
(You know what else used to crack me up? Dodge as a skill. Especially when interpreting the skill through the rules for skill improvement. You could spend experience points on Dodge... which meant that you were actively practicing getting out of the way of some stuff. Is there a special place you go to hang out and dodge? A gun range, maybe?)
Anyway, back to the point. I'm not saying that there's no place for computers in a Vampire story. I'm saying that vampires doing things with computers doesn't need to happen so frequently or with such a broad range of outcomes that it needs rules to allow vampires to interact with computers. Maybe a story suggests that there's a computer with critical information on it. If the Storyteller needs the players to have that information, they get it. No dice rolling. No dice pools or modifiers or rolling and putting Willpower into it -- if the players need the information and one of them thinks to say, "I look it up on the computer," then, okay, they get the clue off the computer.
Too often, designers overlook this, especially in skill-based systems , or in modern games that, as a result of the design, assume that if it can be done in the modern world, rules need to exist so that players can do it via the system. In many cases, it's just not discriminating design. It's kitchen-sink design, and it ends up making extra work and diluting the experience of play. At best, the system is going to lie, created but unused, in some forgotten drawer of the game. At worst, it's going to derail play of the optimal game experience with minutiae or a tangent that undermines the game's true goal.
The second-edition Vampire Players Guide had tanks, lasers, and military aircraft. The developer wanted your vampires to have fights with tanks and helicopters.When you build a system into a game, that means you as the designer want the system to be used. If you want your vampires hacking away at their computers, you make a Computers system for vampire hacking. It's like Chekhov's gun: If you write a play and put a gun in it, you're stating implicitly (and eventually explicitly) that the gun is going to see use. If you don't want something to happen in a game, don't build it in there.
The other side of this principle is true as well. If a system exists, it exists because that's what the designers want you to do. Aion has skill-based crafting that results in occasional failure of the crafting character to produce the item. Logically, then, the designers of Aion want you to fail sometimes, and thus want you to lose items (thereby sending you back into the world to seek more items). EVE Online wants you to lose a ship every now and then, and eventually wants you in open conflict with other players, especially via corporate or alliance warfare. Age of Conan and Lord of the Rings Online want you to spend a lot of time playing their preconstructed content, and though you can do it with other players, they don't want to mandate that you have to or even encourage you to do so. It's easier to solo than it is to play through content as a group, so that's what they want most of their players to do.
Bear that in mind when you create house rules or write your own games. If it's not part of the game, don't include it. Make it "realistic" only if verisimilitude is key to the play of the game.
January 26, 2010 
A tiny werewolf, which dwelled duplicitously inside the hide of a possum.I saw a dead possum in the road on the way to work. Something about the way its shapeless carcass lay in the road suggested that something else was previously inside it, and had shed its possum costume and gone about its buisness. A very small lycanthrope, perhaps.
