Yeah, it just feels like they use the same voice actor (or give the same direction) for all these games. It's all soft spoken, slightly dreamy/wistful delivery of lines that amount to "When I was a kid I told that person I hated them when we had a fight. I regret that now." and then some solid, reliable bloke will pop on the line being all "Hey, hope everything is ok, it's important to explore all your emotions while fixing the pump that is powered by berries for reasons."
Basically, I kinda miss GLADOS.