Not every technique is a good fit for all.

I have worked in an agile environment and it worked well BUT you need a team that works well that way. Agile has also become damaged by being wrapped up in practices and rules that go against the whole original idea.

I loved the peer programming we used BUT again it was a good team that worked well that way.

If you have any conflicts between people it could get ugly real quick lol

I am not in an agile shop now. But we have our own team tempo and it works for us. I don't miss the agile space, just different.