I think we can all figure out what are some of the most popular ants just by looking at the most active journals. However what are the least popular ants to collect an keep? I have a feeling for some members Dorymyrmex spp. might be on the list.
For me I find these couple of species undesirable and have no interest in keeping them; Linepithema humile, Solenopsis invicta, Solenopsis geminata, Brachymyrmex patagonicus (these are so tiny and annoying)
Those are mine for now, I'd like to see what people come up with based on their different locations.