USMC Museum, CC please

I'd really like to get better at taking photos at museums and places I travel to. Here are some pics from a recent trip to the USMC museum in Quantico, VA. I'd love some critique/advice on really everything, composition, post-processing etc... These were all with a Panasonic G3. I don't consider myself a photographer or anything so I won't be offended, just want to get better.

Thanks!