i agree with you there straydum, whilst you can get aggressive fish, you will also find some that are okish and some that are just completey nuts, bit of a sliding scale for each group.
when i picked my gt, it was the only one chilling out under a plant, the others were either fighting each other, or trying to get fish in the next tank!
I opted for this one, and to be fair never had issues with him/her until he/she got to around 6", but even this, only means the odd chase off and very rare lip fighting