Ah ok, well this is certainly a difficult question.
My least favourite is called the Odontomachus (apparently), these absolute bastards bit the living shit out of my partner and I after we (extremely foolishly) embarked on a trek through a Ugandan rainforest in search of a bat cave whilst wearing flip flops. Little fuckers swarmed all over us and whilst their bites don’t do any harm it wasn’t a pleasant experience.
I liked seeing those tiny little red ants you see sometimes on the rocks in my Grandparents old house, some fond memories of looking at them as a kid.
Your standard black ant in the UK seems like a GBOL, fascinating little knobheads.
Erm, Flik from A Bugs Life?
Struggling now…