I know. I am slow, but here are my thoughts on the top 10 Questions from Random Wizard.
(1). Race (Elf, Dwarf, Halfling) as a class? Yes or no?
No. I love my B/X, but I like to be able to choose race and class separately. Granted I just don't play many demi-humans.
(2). Do demi-humans have souls?
Halflings and Dwarves do, Elves and Gnomes do not. By that logic then neither do goblins and maybe not orcs.
(3). Ascending or descending armor class?
Ascending. Sorry it is just better game design and better for newbies.
(4). Demi-human level limits?
No. I understand why they were used, I just buy the logic.
(5). Should thief be a class?
Yes. Though an argument could be made that Assassin shouldn't be.
(6). Do characters get non-weapon skills?
Why not? If I want to play a skills-based game I have Unisystem and GURPS, but a few extra skills for characters in D&D never hurt.
(7). Are magic-users more powerful than fighters (and, if yes, what level do they take the lead)?
They should compliment each other. But Wizards take the center stage as soon as they get Fireball.
Also I think high level fighters should be able to wade through scores of enemies, knocking them down like a lawn mower does to weeds.
(8). Do you use alignment languages?
Only for religious purposes, using them in public should be viewed as the same as some one today saying "Thee" and "thou".
(9). XP for gold, or XP for objectives (thieves disarming traps, etc...)?
Both. Why not. I like to focus on solving problems, and sometime killing the monster doesn't actually fix anything.
(10). Which is the best edition; ODD, Holmes, Moldvay, Mentzer, Rules Cyclopedia, 1E ADD, 2E ADD, 3E ADD, 4E ADD, Next ?
Actually there no such thing as 3E ADD or 4E ADD since both were called D&D (no Advanced) and the answer is "what ever I am playing and having a good time with". Which was, at the last time I checked, all of them.
Bonus Question: Unified XP level tables or individual XP level tables for each class?
I am happy with either to be honest. Individual XP tables solve a lot of "balance" issues.
I'd get around the demi-human level limits by giving them more XP they need to get per level. To offset this they get some racial powers, ie dwarves get better at finding secret doors and the like.
You can see his answers here and many other replies here.