Dude, I only just played the games for the very first time earlier this year and I absolutely feel what you mean. It's the very first piece of music you hear when you start the game, is used throughout the trilogy in pivotal moments, and is the very last theme that plays in the third game. So awesome
I do see that the narrative and the gameplay have some flaws, but overall, I thoroughly enjoyed my time with the games and the ~100h it took me to finish the trilogy. The Citadel DLC was probably my favourite part of the entire series. I'd also probably put the games in my top x favourite games.