Go with absolutely NO expectations and just let things surprise you ... positive and negative. That's the way to have fun at RV shows. Don't go with the expectation of scoping things out, analyzing and picking everything apart. Go to have fun. Take lots of photos, pick up lots of brochures from the various dealers. Enjoy the food (if there is any), dream, ask questions, look for experienced RVers and strike up a conversation, make new friends, and just have fun. When it's all over ... then the questions will start to form as you look back and recall your photos.
Also, don't settle for just one model, like Fifth Wheels only, or Class-C's only. Look at everything, like a kid in a toy store! Your feet can't move fast enough. Take it all in. Yes, be overwhelmed. It will sort out in time.
I don't think there is a "bad" brand "out there" or any "brand" or type of camper to be avoided. There's something for everyone. It's all a matter of your own mind set.
Best advise, just go and have fun! Look at ALLLLLLLL of them!
Edit:
Sunday afternoon when you are home in your living room watching the television, take a minute and give a reply of your thoughts and observations to the RV show. I think if you attempt to vocalize (or type it out) your thoughts will begin to focus. You are your best teacher! Really!