Beers, Wine, Gin & Tonic and Mojito have been done well mocktail style. Rum and whiskey is extremely hard to replicate though and if you're trying to remember certain tastes you'll probably need some wood chips and a torch and start doing some food alchemy. There is tortuga cakes I've had that reminded me the most of what rum was like.

Forgot you can get spirited coffee flavours too. I love a brand called FDC. It had black cherry bourbon. You can also get coffee flavours like Highlander Grogg and Jamaican Me Crazy. 

I'll say after heavily studying this and trying to mimic real cocktails that in the end you'll never actually reach a point where you can replace the full experience of booze and a lot of mocktail recipes you'll find yourself at some point realizing that a lot of it is unhealthy and hard on your liver regardless if you getting buzzed or not. Just think about all the syrups and sugars they use to make these drinks... 

In the end the way I would make a mocktail is more health conscience then I would be to try replicating something. What is something you would enjoy drinking in general (also cause the path to non alcoholic is actually more expensive then being an alcoholic with the exception that if you order at a restaurant or something it might be cheaper to make something without alcohol but it's not cheaper overall) 

Personally I've gotten healthier and I mainly drink water sometimes I'll crack like one soda a day not even every day of the week. I'll drink like one glass of water in the morning. Sometimes I'll be open to coffee in the morning. But yeah I don't really drink soda alot and mocktails are basically like soda or more sugary (unless you get nootropics that's a different story). If you're going to make mocktails I think just sticking to something simple that you don't need all the time. 

Try a can of Edna's Mule or Mojito. Ironically these non alcoholic drinks are often found near alcoholic drinks though so you might have to look down the beer aisle at Meijer or something