OK. Some of my stories, mainly revolving around a group that I gamed with in my university days. Lets call three of them... M, R and C.
M is sometimes the DM. Trouble is, he is a WoD fanatic, which means he is always trying to pull stuff out of his rear and come up with elaborate stories with umpteenth NPCs with more character background than the entire Battletech universe put together. Each. I mean, he is a very intelligent guy. Give him a computer engineering problem and he'd solve it for you. And he is a nice guy too. He will solve it and explain it to you instead of telling you to read it up and do it yourself. But when it comes to DnD, he is a complete loon.
Some of his more infamous reasonings:
1. Soulknife is broken because you get a +10 weapon for FREE. That breaks the WBL table, so if you want to play a Soulknife, he will reduce the treasure accordingly.
2. Mystic Theurge is broken because when you are level 20, you are a level 15 wizard and a level 15 cleric, when you would normally need level 30 to get.
3. Psionics is broken because if you take a power like Energy Ray, you are getting the equivalent of 5 spells in one on the sorcerer spell list (i.e., spells like Scorching Ray only has one elemental damage, whereas Energy Ray can be any of 5). Also, you can nova and kill everything by just augmenting it through the roof. Even after it was pointed out that there is a manifester level cap, he still maintains that it is broken because you can spend all of your power points on 9th level powers exclusively.
4. His idea of a good character is a Half-Orc Barbarian 2/Fighter 3/Bard 3, who, get this, does his Inspire Courage routine BY PLAYING DRUMS...! Seriously. Drums! Anyone wanna tell me what is wrong with that idea?
5. He ran a NORMAL MAGIC Level 12 campaign with one restriction: No clerics or druids. I'm not kidding. If you can heal, the healing is via fast healing (so your CLW will give you the 1d8+5 hp over several rounds). This is because he believes that healing is overpowered. Oh, and he has a DMPC barbarian who is more intelligent than the psion. Don't. Ask. Me. Why. Lastly, in that level 12 campaign and the party ran up against a legendary dire shark with permanent spell turning. The sorcerer did NOT make his fortitude save vs his own Disintegrate.
R is a bit of a snobby type. He talks to people like they are absolutely thick. The only problem is... well, judge for yourself:
1. He is in the same boat as M where Mystic Theurge and Psionics are concerned. He even tries to explain why they are overpowered using that "you have to be absolutely thick not to see what I am saying" tone.
2. He is one of those "that rule doesn't makes sense" types. And he will ARGUE why it doesn't make sense for hours. As if anyone else cares.
3. He created a druid who dipped fighter because he wanted lance proficiency so that he can use his Ride-By Attack feat on his light horse animal companion. At level 8. Yes, he took the fighter level at level 8! He was actually rushing around the battlefield on his amped up light horse (he bought some horseshoes of speed so that his horse can run faster) trying to run people through with a lance! He is not wildshaped. He is not casting spells. He is bloody playing Sir Lancelot. With a frakking DRUID!
4. Monks with TWF is overpowered. d20 damage with 8 attacks (he included flurry)? Bro-ken!!
C... well, what can I say about C? C is one of those people who think that Chaotic Evil is the bestest best alignment ever. Everyone should be CE. It is fascinating. It is great. It is deep, man! Every character he has ever played is CE, even if his character sheet says otherwise. I remember a time when the DM gave him a DMPC to play. The backstory of the DMPC was that she was one of the party's recurring nemesis, who, after getting captured and having her past revealed to her (her Evil demonspawned father apparently kept it secret because her mother was half-celestial or something like that), felt betrayed and turned to Good and is seeking redemption. So, what did C do? In the very first battle after the sheet was handed over, he had her drop an AoE spell right into the middle of where half the party was fighting with the bad guys. He reasoning? It is a Holy Smite spell. In her "fanatical" mind, if they weren't Good, they deserved to be fried. Yes. He turned a girl trying to find redemption into Miko Miyazaki!
Oh, and every game that he had ever DM'd is an Evil campaign.