In My Best Laid Plans the Janitor's little moment with Elliot is pretty heartwarming.
Janitor: You're the only one around here that treats me like a real person.
Elliot: What did you say?
Janitor: There was one other girl a few years ago, red haired doctor. She used to eat lunch with me until the other residents made fun of her. They called her "Janitor lunch eater", not the most clever group. Anyway, I know that you don't think about me the way I think about you and I never really believed that you would or that you could. But just pretending for today made me feel good for a change. I'm sorry.
Elliot: You know what, it's ok. I actually had a good time.
Elliot smiles and walks out
Janitor smiles to himself and walks out as well