This definition only accurately applies if you are enjoying the alcohol in moderate amounts. Going overboard indicates greed and non-constructive overzealousness. This is not something that you want to be associated with. Drinking too little indicates a fear of success. Seeing yourself drinking a medium amount in your dream just means that you are happy with where you are at and are looking forward to more success in the future.
This same situation, drinking alcohol in moderation in a dream, can also be said to relate to your need to be more spiritual. When you consume alcohol, which is also known as spirits, you are thirsty for the spirits. Therefore if you are spiritually starved, the dream may be telling you that you need a greater spiritual influence on your life. Even if you did not know it, this is something that could very realistically be what your dream is really about. You thirst for greater spiritual understanding. In waking life, try to make more time to commune with your more spiritual side; however you do that in your particular religion or walk of life.
When you have a dream in which you are drinking too much alcohol has connotations related to gluttony and greed. You are too fixated on having more of everything that you cannot enjoy what you have. Despite all of the hard work that it took to get you to where you are, all you care about is obtaining more things, owning more things, you do not care about the ones that you own. This is a self destructive attitude because the ones that you love and the ones that love you will eventually leave you if you cannot focus on the now. Take this dream as a warning to revel in the present and not be so concerned with the future. Often a situation like this evolves out of the best intentions. You are not a bad person; you just need some time to think about what is really important in your life.
If you have dreams where you are constantly consuming alcohol, this can also often relate to issues that you have with alcohol consumption in your waking life. When you have had so much alcohol that your mind becomes polluted with constant thoughts of alcohol as well, you might want to think about cutting back on your alcohol consumption. Take this dream as a distinct warning for you to curb your habits in whatever way you can. If you do not have issues with alcoholism, then perhaps this dream is here to tell you firmly that you do, and do just not know of it. Perhaps you are in denial. Really consider how much alcohol you drink and ask yourself if it is normal to have this much alcohol. If not, then you might want to think of this dream as a warning to slow down in interest of your future safety.