If you have to search for loop index variable, your code has worse problems than naming.
I mean - I don't recall writing a loop longer than 2 screens in years. Usually a loop is less than half a screen long.
And anyway, you can search for [^\w]i[^\w] if you really need to.
Maybe it's aquired taste, but in array-heavy code (usually math-related) I much prefer A[i][j][k] * B[j][k][i] than the same with long names for index variables.
