I've played the low stat character in a game with an uber-character. This was the campaign that started our group using point-buy. Calculated with point buy, my character was about an 18 point-buy and the other was about 40 point buy. The numbers may not be exactly accurate since it has been a few years since the campaign and I had stats lower than 8.
Social interaction for the characters wasn't much of a problem. I wasn't the face man for the group anyway. Combat, on the other hand, was a different issue. If a combat was scaled to my character, the big guy would look at it crosseyed and it would keel over dead. If the combat was scaled to the big guy I was forced to stand in the back and hope nothing got past the front line (okay - slight exageration here I will admit. He had to hit the monsters with a sword and THEN look at them crosseyed for the critters to die. But my point still stands
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I say drop the character. Gloat all you want to the group, it's a great story after all, but don't have the uber-character next to a guy that had to roll six times just to get what is classified as a viable character by the DMG (with all six sets rolled in front of the whole group and still told as a comedy story (even by me) to this day). It is easier on the DM and all of the players if the characters are about even. If the fight is a fair fight to you the weakling will be in the corner shaking like a leaf. If the fight is fair to the weakling you will be bored from how easy the combat tends to be.
Social interaction for the characters wasn't much of a problem. I wasn't the face man for the group anyway. Combat, on the other hand, was a different issue. If a combat was scaled to my character, the big guy would look at it crosseyed and it would keel over dead. If the combat was scaled to the big guy I was forced to stand in the back and hope nothing got past the front line (okay - slight exageration here I will admit. He had to hit the monsters with a sword and THEN look at them crosseyed for the critters to die. But my point still stands

I say drop the character. Gloat all you want to the group, it's a great story after all, but don't have the uber-character next to a guy that had to roll six times just to get what is classified as a viable character by the DMG (with all six sets rolled in front of the whole group and still told as a comedy story (even by me) to this day). It is easier on the DM and all of the players if the characters are about even. If the fight is a fair fight to you the weakling will be in the corner shaking like a leaf. If the fight is fair to the weakling you will be bored from how easy the combat tends to be.