Tosh was unevenly-characterized in series one, though you can sort of make it all work. She started out as a stunningly badass snarky tech geek and sort of drifted to being not sort of unsure of herself and second-best at computers...

And the thing no one seems to ever take into account about GBG is that it happens after Countrycide an episode where the entire team gets broken into itty bitty pieces. Well, other than Jack, at least. I dare anyone to go from that to a day or two later with your co-workers being all in-jokey and NOT walk off and kiss an alien.