I loved my Colombia time as I had a form of fast-track automated immigration thing - very much like what australia has in that you go to a machine, not a person - but in Colombia almost noone had this so my biggest queue there ever was ONE person in front of me.
In contrast, doing the QF28 milkrun from SCL to SYD, you arrive early evening, shattered, and despite being a premium pax, there is no such thing as priority luggage, and they insist on feeding all the bags onto a carousel that can hold about 20 bits of luggage. That part is always sheer agony. Each time I have to wait whilst 400 other people wander of the plane, stuff around with immigration, then linger in duty free, before they eventually take their bag off the carousel which allows just one more bag to pop up.
AArrrrgggghhh! I started this reply almost calm, but am now getting upset again!!