hardest question ever ive been to well over 100 concerts in my day so i have many to choose from so i will name my top 5.
1. Taproot and Mudvayne
2. Spineshank, Ill Nino, and 40 Below Summer
3. Rammstein, Slipknot, SOAD, and American Head Charge.
4. Taproot at a Small Bar when they played a 90min set.
5. Limp Bizkit, Eminem, Papa roach, and Xzibit haha. This was back in the day when i actually liked them all.