The problem with alcoholism is that eventually the alcohol wins and takes over. The first few years you are alive, bubbling, happening. And then the slow, painful descent happens...
The mood swings take over, the energeticness turns into franticness, the creativity (connected unrelated subjects into something new) turns into paranoia (connecting unrelated subjects again, without the productive output). Your hip, almost aloof personality turns into detached. It becomes ever more difficult to relate to others, you can no longer understand irony, have lost the understanding that most acts of people were not done with you on their mind, you find it difficult not to see attacks in the behaviour of others. The highs alcohol once gave you turn into despressants when the alcohol is absent.
The alcohol always wins and always ravages a personality.