There is a saying in the rooms of AA: "The good news is, when you sober up, your emotions come to life again. The bad news is, when you sober up, your emotions come to life again."
Many of us have so totally drowned our emotions in booze and drugs that when we finally start to feel again, we can overreact. Watch yourself, you could bite somebody's head off for an action that calls for just a minor rebuke. I know that happened to me.
The good emotions also come back too though. Part of my sobriety has definitely been getting back in touch with myself, as in the past alcohol numbed me to everything.