What is everyone's favorite flavoring mixtures for buttercream?

TIA

Anybody??

Depends on what you like and flavor of cake. I personally prefer plain vanilla buttercream (mixed with powdered oreos). ;)

i just wrote this in another post but yesterday i used white balsamic vinegar in my american buttercream :) i usually use buttermilk to get a little tang but mostly to tamp the oversweet so i was out of it and my husband had already been to the store a couple times in fact so i improvised and it worked great -- i also had a good glob of vanilla bean paste in there -- 

but i too mostly go vanilla or chocolate and make up any flavor variations with fillings and splashes (flavored simple syrup brushed on the cake layers)

bam

but it didn't taste vinegar-y at all -- just not cloyingly sweet -- tasted great

Thanks for the replies.  But what would be your mix of extracts flavorings?   I haven't been on here in a while and at one time there were people doing a   mixture of extracts flavorings that tasted like 1 can't remember the name.  (vanilla, maybe lemon and something else??)  

Personally I like vanilla and almond, vanilla and lemon and vanilla, almond and lemon together.