If your dad tends to his home bar as if it were his livelihood, then it's hard to go wrong gifting a nice bottle of booze. It's thoughtful, not too expensive or too cheap, and — unlike a new gadget or a DVD — it's not a problem if he already has one.
Maybe I'm biased: since my dad and I share a love for cocktails, I find myself often shopping for top-shelf spirits that aren't superpricey but also aren't run of the mill. Based on years of research, here are my recommendations for all types of drinking dads. Of course, I'm always looking for new booze to try, so add your own gift ideas in the comments.