I won't get into a flame war here, but I can tell you why I shoot the way I do and the reason why I posted before.
1) Do I shoot with a tripod...yes at times. Majority of the time, no. I like shooting in public places and other people's tanks. In public aquariums, you don't have the luxury of shooting with a tripod (you do if you go to an event as an invitee or an after hour event).
2) Do I shoot with a 105mm VR lens...yes. I also shoot with a Tamron 90mm f/2.8 macro, the 55mm f/3.5 micro, the 105mm f/2.8 micro (non-VR), the 60mm f/2.8 micro, 50mm f/1.4D (with and without extension tubes). Only one of these lenses have VR, and you know what? VR isn't necessary and most people don't use it to shoot macro (I leave VR off when I shoot). The reason why is simple. To engage VR, it takes time. Subject matters move, including fish, bugs, etc.
3) Expensive lenses such as the 105mm VR. I've gone through and own various lenses and why do I use this as my main macro lens? It's because it's a great balance of both sharpness, focusing speed, working distance, and balance. To some it's expensive, but when you want to nail a shot, pick whatever will work for you.
4) ISO boosting. I usually don't shoot anything beyond ISO 400. Why is that the case? I shoot with an older D2X, which doesn't perform as well as most of the newer cameras as far as noise is concern. Most tanks have enough light for you to shoot a macro shot with a balance of ISO, shutter speed, and aperture.
5) Using a tripod. Is it necessary. Sure it is and like I said, if I was dealing with a real low light condition, then yes. Why don't I use one? It's just my shooting style and mine alone. I've seen some amazing shots taken with one (the acan posted earlier being one) but for me, it doesn't suit my style. Also, some people prefer to take some top down shots. Do they use tripods? Nope. It's due to the need for a top down box and the angle that's needed to shoot them...
6) exif info. Why bother with them? Well for one, it's a great way to go back later on down the road to see how you shot something that you like. Instead of starting from a baseline and taking test exposure and settings, you have something to work off of from the beginning. Some people are meticulous with notes, others not so. exif info is a great way to keep notes as the picture was taken without having to write down anything.
These are handhelds shots, non-VR on (if that particular lens was used), non-tripod, not boosted ISO...
105mm VRs:









50mm 1.4Ds:


Tamron 90mm f/2.8s:


This is also my last post in this thread. I came here to post both my advice and experiences and not to get into a flame war. It doesn't look like it's needed or even wanted. I'm not here to get thrashed for 'not having the right gear, shooting w/boosted ISO, etc.'. Didn't think that constructive criticism and advice were so hard to give. Best of luck.