At first I would not wear any sort of protection other than gloves and a helmet. When a newbie, I used to be irrationally concerned about looking like "all the gear and no idea". Yeah, I know immature, or a severe case of "are you looking at me?!. But pain is a very good teacher! So gradually I armoured up.
The first item was proper protective glasses after receiving one too may prods around the bony orbit which may have equally gouged out an eye. Now it's usually brambles or the low branch hiding behind the first low branch that swipes me across the face.
Following a rather nasty ground strike when cornering hard on a downhill bend and my front wheel washed out. I cracked my knee cap and I still can't sit on that heel to this day! So I started wearing knee guards. I later upgraded to combined knee & shin guards when I switched to flat pedals (pedal strikes) and started to ride amongst brambles and nettles! (shins).
Elbow guards came soon afterwards. It seemed that every time I fell off I landed on an elbow and damaged my shoulder ligaments, as well as severe gravel rash to the forearm.
Then a proper trail helmet instead of the XC helmet that I had been wearing. I have broken every single helmet I have ever owned except the two I have now. I don't want to be even a tiny bit brain damaged!
My backpack protects my back of course and my gloves & boots my hands & feet and my Sealskinz mid length socks protect my lower legs not covered by my knee & shin guards.
When descending Jacob's Ladder in the Peak District, I did a full superman over the bars. My bike went on without me cartwheeling and bouncing from side to side for about 60 yards or so. I did a full 360 degree roll on the rocky ground and much to my astonishment, landed on my feet! I stood there waiting for the pain and there was none! Result!
Along the way I have bought 661 vest and shorts that protect the shoulders, chest, hips, and base of spine. And a full face helmet. I no longer use the 661 body armour (it is just too hot), but I wear the FF whenever I go anywhere outside my comfort zone. I no longer care about "all the gear and no idea"!

As anyone can tell by looking at the rest of my clothing, the style of which I would say was called "grunge".
