I feel you with "not wanting to give negative images." I visited a few schools and while I feel the information I gathered was helpful, and sitting in on classes was very valuable, I can come off as, shall we say, a bit socially awkward. I left a few meetings with admissions officials thinking it would have been better not to give them that information before they admitted me and hoping they would not put a face to my application. I'm not sure what the answer is (don't be awkward?) ,but the question of whether to visit is one I've dealt with too. I will say going armed with good questions would be very helpful. If nothing else, it can help you avoid getting nervous and making rambling incoherent statements :-)

@ I also had a hard time with the LG section. It has always been my weakest section, but I had gotten to a point where I was confidently completing at least three games in all my the prep tests. On this one I was bumbling through the third game (the watercolor/oil paintings) and didn't even get to the one about the companies switching buildings. Just wanted to let you know you weren't alone thinking it was a rough section :-) In any case, I think I had a better experience than the guy in the room who threw up in the middle of it.