The contents and context of the conversation leading up to Rob Alto saying, "Not Exactly, thing is..." is up to the interpretation of the viewer.

For example possible topics that could lead up to that line can be:

A. The Subject of "Abandoned Houses", dimensional planes that seem to function like JRPG dungeons and contain "Residents", which are usually monsters.

B. Acquired tastes for coffee.

Either way, make up your own ideas. This idea was entirely random.