Allow me to put it this way:
Experience points for treasure found (dropped)
- Affirmative
Demi-human class-level limits (eased or tightened)
- Affirmative (ignored them)
Grappling (changed or ignored)
- Affirmative, although really what we did was remove grappling as a consideration of possible tactics simply because the system was so whack
Hit point gain after name {9th+} level (changed)
- Negative
Weapon speed (changed/dropped/ignored)
- Yep.
Weapon type vs. armour type (changed)
Weapon type vs. armour type (dropped/ignored)
- Yes to both of these options at different times.
Initial roll-up (used different method than in PH)
- BIG yes.
Encumbrance
- Ignored until DM wants to be annoying
Initiative (changed system)
- Yep.
Initiative (re-roll individually every round)
- Yes. (Once I made a decisive major effort to use the system By The Book. I never did figure out on my own how that was supposed to work. Ergo, an altered system was mandatory.)
Spell casting times (changed or ignored)
- Yes. The first House Rule system I played under was one that until quite recently I thought was the product of a drug-induced psychosis. I have now come to see it as quite close to being a more succinct yet true-to-the-original system. As long as I played 1E, however, it was under SOME form of altered spellcasting/initiative system.
Spells (minor tweaks to some/many)
- Yes, minor changes to some.
Spells (major changes to some/many/all)
- No, few if any spells were substantially altered in their effects.
Spells (complete rebuild)
- No. Although I tried a number of times to start such a project (Mostly just a reassignment of spell levels across the board to try and re-balance. Too much work for the actual potential benefits.)
Spell casting (used spell points or non-Vancian)
- No.
Regaining health/h.p. via resting (changed or eased)
- No, this was always by-the-book
Class-alignment options (eased or tightened)
- No. Also RAW.
Alignment-change consequences (changed or ignored)
- Yes: largely ignored.
To-hit matrix (changed)
- Not so much changing the values but definitely converted to THAC0 before the term was in use, and later adjusted to fit the 5% principle.
Item or character saving throw matrices (changed)
- No (same as above)
Clerics affecting undead (changed or rebuilt)
- Not a whit.
Psionics (changed or dropped)
- Dropped, though we flirted with it occasionally.
Armour and shield (e.g. changed AC values)
- Yes. Eventually came to have small shields as +1 AC, medium and larger shields +2 AC
Weapons (e.g. changed damage dice)
- Yes. Dropped damage vs. large, and adjusted a few like bastard sword and crossbows
Must state action before each round (ignored)
- Not ignored but we always had issues with it, given that we were using initiative systems that were never quite comprehensive enough.
Core classes (one or more changed or rebuilt)
- Yep. But only the Monk.
Monster morale (changed or ignored)
- Ignored at will; checked only when DM is feeling lazy
Henchmen and-or loyalty (changed)
- No. We used few henchmen/hirelings so the matter seldom came up in the first place and we only paid attention to it if a player made a deliberate attempt to screw his own subordinates.
The Wandering Prostitute Table (changed or ignored)
- RAW! (In a manner of speaking...)
