Crazy Way to roll Stats.
I've done this method once or twice. I find it a) yields at least 1 18, b) limits min maxers to having really low secondary stats, and c)really eccentric rolls for characters.
First, and most importantly, choose your starting class. This cannot change.
Take your standard gaming die, a d20, d12, d10, d8, d6, and a d4 and roll them all once.
Place each of the die results into 1 of the 6 stats, per the players choice. Dice set to these stats, cannot change.
Roll the d20, d12, d10, d8, d6, and d4 a second time, and add 1 die to each stat following these three rules.
1. No stat can be higher than 18. Sums of Dice over 18 are set to 18.
2. No stat can be lower than 8.
3. If it is impossible to make all stats at least 8's, start from scratch.
If I'm building a party with this method, I keep track of the point build of every character, and the lowest character in the bunch has his highest stat (and only the highest stat) raised until his point value is no longer the lowest. This may mean that the weakest character has a highest stat over 18. I permit that in this case only.
And the highest point build character has his stats lowered, monopoly building style, until no longer the highest point build (Always take one point off the highest stat, then either another point of that stat, or switch to the new highest stat).
Let's say someone wants to play a Wizard. After Round 1, The Wizard sets his rolls to Int: 11, Dex 7, Con 7, Wis 6, Cha 6, Str 1. Round two, the rolls are as follows: 17,12,3,3,3,1. Now the player has a corundrum. If they want Starting Intelligence to be 18, they have to burn at least 5 points for stats, and doom themselves to multiple stats with negative modifiers. Plus, the only two rolls allowed for Str, are the 17 and the 12. So you might as well, not waste the 17, so the final stats might be:Str: 18, Dex:8, Con:10, Int: 18, Wis:9 , Cha:9.
Or the player could not waste as many points and do: Str: 18, Dex:8, Con:10, Int: 14, Wis:18, Cha:9. Not exactly prototypical for a Wizard.
Following the rules for equalizing out the party value points usually means the "best character" doesn't have an 18 in their prime stat, and the "worst character" has at least 1 18, and perhaps something higher.