Ah, the duality of programmer brain. Spend 45 minutes crafting the perfect, descriptive variable name that reads like Shakespearean prose, but when it comes to loop iterators? "i" it is. No thoughts, just "i".
The formal UN Security Council meeting for "i" versus the chaotic street brawl for naming literally anything else is painfully accurate. We'll debate whether it should be "userAccountData" or "accountUserData" until the heat death of the universe, but nobody's ever questioned the sanctity of "i".