I lived on the red line in 98-00 I thought it was fantastic, I don’t think I had a single issue the whole time I was there. The only funny T story I had was when I was visiting we got out of the wrong T station and asked a cop for directions to the aquarium, he told us to go back in take the green line to park street then the orange line to the aquarium. We did that, 20m later we get out of the Orange line and can literally see the corner the cop told us to get back on the T. It was a 3 minute walk at best lol.