With liquor, I think you're generally in good shape as long as you stay away from things that are sweet. It's often the amount of sugars that does it to you as much as the alcohol. People drinking stuff like rum & coke are just asking for it. If I'm drinking liquor I mainly stick to gin, bourbon, or scotch on the rocks, or occasionally will have either bourbon or rum & (sugar free) ginger ale.
I drink vodka on the rocks. For me, it's not the sugar. The only alcohol related sugar I do is the wine.
EDIT: But I do totally agree with you. Sugar is a bastard on the hangover. My mom loves me to make her mojitos with her fresh mint during the summer. Those nights = Hangover of death.
I do not not go full speed as often as I used to. Many factors attribute to that. Mostly, living in a new place, not knowing anybody, I am my driver. Aaaaaanyway, when I do get a chance to go all out I usually start with beer. Lately I have been leaning towards Lambic, I like the sourness of the Raspberry. My Achilles heel is jager, hands down, preferably straight.