Well, it's kinda a given that any type could become an alcoholic. But, I do think it's plausible that different types would have different reasons/motivations for drinking, and consequently drinking serves a different purpose or fills some sort of 'need' depending on personality.
For myself, I did a LOT of drinking my first 2 yrs of college. My reason? It was a form of escapism, I think. I hadn't been a very happy teenager, and I hadn't had many friends at all, and I was tired of being alone and lonely, and tired of not fitting in. In college, it was somewhat conscious -- I kinda decided I was going to try to do everything opposite how I was in high school, because I wasn't happy in high school, and didn't like who I was. Also, I had quite a lot of social anxiety, so I drank a lot - and got drunk numerous times - because 1. I wanted to feel more at ease and wanted to try to fit in, and was also curious about this whole other side of life that I hadn't experienced growing up, and wondering what it was all about, but 2. Deep down I knew I didn't fit in with the drinking crowd, and without liquor I looked around at everyone and was disgusted or whatever, and to drown the disgust I drank, and then I was all happy and stuff and didn't care anymore.
See? Simple as that.
After a couple of years of that, I was able to detach, and realized it wasn't a good road I was on, so I pretty much stopped all together, and since then I've made sure that whenever I have a drink, my motivation isn't to ease discomfort or cover up some other sort of emotional issue.