Guess I better chime in, here! I'm Matthew Amt, and that's me in the second photo above (gray tunic w/ 2 spears). An excellent source for Bronze Age information is the Bronze Age Center: http://s8.invisionfree.com/Bronze_Age_Center/index.php
There's a pinned topic in the European Topics section about clothing information, most of which (of course) comes from the Danish oak coffin finds. That's what my own tunic is based on, but there has been some debate about the shoulder straps, one versus two. Recently, Steven Peffley kindly got me some photocopies from "Costumes of the Bronze Age in Denmark", THE book on the oak coffin finds. (By HC Broholm and Margrethe Hald, 1940.) I went back over the parts about the men's tunics, and the authors believe that they originally each had 2 shoulder straps, probably leather which did not survive. In one case a pair of small disc brooches were found just below the shoulders, as if fastening such straps. Their description of the exact arrangement is a little confusing, and while they show a nice drawing of one of the tunics all laid out flat (with half a dozen small odd-shaped pieces patched together to form the top of it), the photos of the whole thing reconstructed are always covered by the darn cloak! Grrrr.... There does still seem to be some debate, though, so I would say that either one shoulder strap or two is correct.
SO I basically made mine a rectangle, with a pair of wool straps, basically like a sleeveless bathrobe arrangement. The body of the original was more hide-shaped, kind of, though part of that may be due to stretching. But for lack of anything better, I figure this will work for most of Europe for early to middle Bronze Age. Just change a few little fittings and the weapons and shields to change location.
When I first built my Bronze Age web page, I was indeed thinking mostly Mycenaean, and since it was just a little thing on the side I simply attached it to my existing Greek Hoplite site. Made sense at the time. Of course, since then I have done almost nothing with my hoplite kit, while my Bronze Age gear has exploded into 5 or 6 distinct impressions with scattered tidbits of several others, and plans for much more. For my Late Bronze Age kits, Urnfield or early Hallstaat, I go with rectangular tunics, either sleevless or with long sleeves (depending on the weather), and a slit neck. Not a lot different from the basics of Iron Age clothing, really. Wrapped rectangular or tubular leggings if needed, foot wraps, rectangular or trapezoidal cloak. I would LOVE to build a little loom to weave a few belts and straps, at least, because some fascinating fragments have been found.
I tend to lean towards the Late Bronze Age most of the time, since that's where all the spiffy armor and helmets and shields are. It *is* possible to do a full Bronze Age impression with virtually no bronze at all, but where's the fun of that? And while I have been perusing this board lately to firm up a decent Iron Age Celtic impression (to complement my usual Roman look), I strongly urge all of you to cast aside your silly ferrous fetishes and return to BRONZE!! Iron is just a fad, really. Do you *like* rust?
I hope that gets you started!