I tend to cycle through good/solid/high-energy/low-energy/quiet/fine/excellent/great/fast-paced performance; I guess you could use some of those phrases to describe the audience, too. I basically guess the mood of the audience from their laughs and vocalizations, occasionally I’m in a thrust theater where I can actually see their faces to judge that way too. I often have some note about audience reaction, especially for curtain call, and when something unusual happens (distinctive laugh/sleeping in the front row/random applause), but I’m surprised that you are actually required to put it there. Hopefully the producer realizes that you can only report your estimation of the audience response; that your main job is calling the show, so you can’t always monitor or note what’s happening in the house. Plus, reactions from the house don’t always reflect the quality of the performance. I’ve had houses that don’t laugh at anything in a funny play, but say that it was hilarious in the post-show talk, and nights when an actor was just going through the motions, but the crowd went wild anyway. I guess if your audience is giving the same reaction, it's ok to give the same description of it.