I'm of the opinion that if I have more than a page or two of house rules, I'm doing something wrong or playing the wrong system.
Which is why my main game is now Savage Worlds which I discovered last year (thanks to many thirty party d20/d20M companies deciding to convert products).
However, I still enjoy 3e. With the variants in the 3e DMG, Unearthed Arcana, and 3rd party supplements, it was easy to tailor the game to my preference by controlling the options.
Most of my house rules were/are about adding player options (new classes, UA style class variants, Cityscape enhancement wilderness/urban skill swap, UA action points, UA Incantations, combat maneuvers) and, when multiple options were availble, choosing those that best fit my preferences mechanically.
Granted some are done out of preference or dislike
a. Removing Level Drain (never liked this)
b. Removing sunrods, tanglefoot bags, spiked chains, halfling riding dogs etc.
c. Variant: Ability Score Damage (DMG): stops rewriting character ability scores and the time take
d. Poisoncraft replacing the poison rules
e. Artificer's Handbook replacing the magic item creation rules and getting rid of XP costs in the process.
However, some choices make existing WOTC supplements unnecessary
f. Using the Book of Iron Might means I have no use for Bo9S
g. Using Green Ronin's Psychic's Handbook means there is no need for XPH
i. Using the martial Rogue and wilderness rogue means there is no need for the CA: Scout (which I don't like, mechanically, anyway).
Then again, some are done for Setting
j. controlling the races and classes (granted their is some exclusion to prefernces as well)
k. Making clerics spontaneous divine casters (UA) and limiting clerical spells to those related to the deity's domains plus a few spells shared by all clerics. Clerics have more flavor as the choice of deity becomes more important.
l. controlling PrCs
and/ or balance to bring down the spellcasters
m. limiting cleric spells to their deity's them tones down the class
n. banning or altering some spells (also done for setting flavor)
o. re-instituting some previous edition restrictions on wizards to find spells rather than spells automatically and increasing time to regain spells
I only ban stuff (generally on a case by case basis) that makes the game less fun. There's a lot of stuff that doesn't appear in my game by default - any number of prestige classes, for instance - but if one of my players came asking about using an unusual PrC my normal response is "provisionally yes, until it looks like it's broken."
GMs who rewrite whole systems with a ton of house rules send up major red flags for me. I'd be a bad player in their games. I learned that back in 1e, when a heavy-house-rule GM turned out to run a game I found really frustrating.
Right, not every player is appropriate for every game and not every game is appropriate for every player. Better to move on and find compatability for a more enjoyable game.
I think there are several types of house rules (as shown above).
1. The exclusion of specific core options
2. The use of official variants from core books
3. The exclusion of elements from official supplements.
4. The use of exclusion of alternate rules and rules variants from third party sources
5. Homebrew material: new material (e.g., classes, UA style class variants, spells, feats) or the alteration of existing items (e.g., classes, multiclassing, grappling and spells)
And they are done for several reasons including:
1. Perceived balance
2. To fill in perceived gap
3. To alter specific mechanics or elements to a preferred feel or style
4. To tailor the rules to a flavor for a specific campaign.
Anyway when you write 1-2 pages of house rules, do you mean (using 3e as an example):
a. a checklist of variants and options from the DMG (e.g., variant ability loss and variant: training) and Unearthed Arcana and references to specific items in books (e.g., the spellless Paladin and Ranger variants in Complete Champion) or the Book of Iron Might Maneuver system and rely on the player to look them up?
b. writing out some bullet notes (e.g. Sorcerer's: as inheritantly magical beings, they receive UMD as a class skill, Eschew Materials at 1st level and a bonus metat magic feat at levels 5,10,15,20 and Wizards being studious receive Decipher Script and Speak Language as additional class skills)
c. fully writing out each of the variants by source? or
d. a combination of the above?