I find Tim's relationship with his father really very interesting.
The Drakes had always been negligent with Tim. They had a habit of traveling a lot and leaving Tim alone unsupervised, but despite almost never spending much time together, Jack loved his son.
After losing his wife and becoming paraplegic, Jack had to stop spending months traveling for work and, for the first time, he started living with Tim daily.
And now he realizes that in the last years, his son has spent far more time with a stranger than with him. The man next door knows Tim better than his father.
Not only that, but there's also Jack's resentment toward Bruce, who, as a able bodied man, can go out and have fun with Tim in ways that Jack can no longer, and never bothered to do when he could.
Tim also feels bad for feeling like he's replaced his father with Bruce; it was never his intention. But Jack was simply never there, and while being Robin, he got used to Bruce's constant companion.
Jack spent months in the hospital, and Tim lived with Bruce during that time. But now his father is back and is always at home, and even though Tim truly loves him, he doesn't know how to deal with it.
He often thinks about and tell Jack his secret identity to make things easier, but he knows he can't.
That's the big difference between Tim and the other Robins Batman has had so far. He's the only one who frequently struggles between his vigilant work and his academic and domestic life because he has a family that isn't Bruce.
The most important people in his life can't know he's Robin, and while seeing Jack realize how wrong he was with Tim and trying to reconnect with him should be sweet, it only makes it harder for Tim to keep his secret.
Robin III: The Cry of the Huntress #3 & #4
Robin II: The Joker's wild! #4
