What soft drinks mix well with alcohol to make a great drink? What soft drinks mix well with alcohol to make a great, yet unique tasting drink? 

We have all heard of rum and coke which is known as a Cuba Libre. I would like to try some other soft drinks with alcohol mixes that could be in someway less commonly known to the average person, like rum and coke. I would appreciate any recommendation possible and the reasons why the recommendation makes a great yet unique tasting drink.

Bottoms Up!
If you want something sweet you can try 

amaretto and coke (some more detailed information)
for an even sweeter experience you can even go for a mix with Dr pepper 

It has a slimier taste to a bakewell tart so it is recommended if you like sweet things