How much can a person who loves drinking hard liquor a lot drink a night and get more than a buzz without going overboard?

Well, I enjoy drinking myself and liquor is part of that. I looked up alcohol at webmd.com and a link in it says 5 (five) drinks a day is considered heavy drinking. According to this link, a drink is equal to a shot of liquor, a beer or a glass of wine (don't know the amount for wine). So, without going overboard, I'd say that 3 to 4 "shots". Closer to 3.