Interrogation, being looked down upon... these were the sort of things that Gregor had to deal with on a regular basis due to his being a Collector. He had already encountered an aggressive Krogan, as well as an Alliance colonel who was most intrigued by him. Now, he finally was alone for the first time in a good period, and he was eager to finally socialize with someone instead of being threatened or having a gun pulled on him.
Then again, those were just the best wishes, after all. They were admittedly unlikely to happen, as much as Gregor wished they would. He was a Collector, he couldn't even verbalize with others - only able to talk through the machine.