Not sure about never feeling the same. I have been in proximity to three bombs when they went off, and while one was a bit pathetic, the other two were pretty scary. Never realm changed how I felt about the places.
I was in London on the day of the 7/7 attacks. In fact, I got on a Circle line train at Paddington quite normally and was made to get off at Bank (I had been on my way to a merchant bank near Liverpool Street) which means my train must have passed the one with the Edgeware Road bomb in it and was behind the one with the Aldgate bomb.
We were locked in the bank's office all day and let out around 5pm. I then walked to Waterloo Station which was quite an odd experience because there was no vehicle traffic of any kind in central London and thousands of pedestrians walking, mostly in silence. There was the usual rhetoric and hysteria in the papers about London being in fear and panic, but I saw none of that at all. I just saw people trying to get home.
The next day everything was back to normal and as with you, it didn't change the way I felt about London or the underground at all.