What's your favorite piece?
Most people probably will instinctively say the I but that really isn't a fair answer.
The T used to be my favorite but the Tetris Company totally ruined it for me when they made T-spins worth more than Tetrises. The owners of that company should all be hanged in Times Square.
The S or Z are now my favorite, but I prefer the Z since I build left-to-right and it fits in better.
The L and J frustrate me because I always plan on getting one and then never do and then die.
The O would be the best if you could only get one piece for the whole game, that would be the most interesting one.
Did you know that the same terrorists who ruined the gameplay also mandate that the pieces can't be random? That's right, in any run of 49 pieces you will always have 4 of each. Absolute rubbish.