I'd recommend the bike personally.
For a 125 you only pay (or did 2 years ago) £15 a year tax, insurance is like 1/3 of the price for a car and before the fuel crises I was paying £13 to fill the tank mine up. After the crises I was paying £13.50. That £13 got me just short of 200 miles. In terms of value for money, it's about as good as it gets for independence.
I depends on the character you are though. If you're the reckless sort, or think you might go quickly through corners, or show off to mates, then you
will crash and hurt yourself - there's nothing gained by being brave on a bike - only lots to lose. If you're the sort of person who is full control of themselves on the road (and I don't mean bike or car control, I mean control of your head) then read on.
I did fall off twice at 60mph, but my worst injuries where a fractured little finger the first time (in that rather horrible accident my second worst injury was some bruises still coming through my torso a couple of weeks later) and the 2nd time I bruised my knee. In a car I'm sure my injuries would be worse in both accidents - you do have a cage around you in a car, but when you're riding in all likelihood you'll separate from the bike and roll away, dissipating the energy gradually, whereas in a car you'll almost certainly come to a sudden stop. Just don't fall off around exposed tree trunks or lampposts. Remember it's the stop which kills you, not the speed.
You often hear stories of bikers dying constantly, but if you buy the right kit, ride safely and most importantly be aware of other vehicles (might that car pull out? if so, assume he will and prepare for if he does), the risks are greatly reduced. I had 2 accidents in my first year. After the 2nd accident (not my fault, and it made me far more alert and aware of what others may do unexpectedly) I came off my bike zero times until it was retired 5 or 6 years later - and I rode all year round, through the winter on untreated Northumberland B and C roads, only refusing to go out if it was icy or snowy when I left - I often came across black ice and snow a couple of inches thick on my way to work, but I never came off. I cannot emphasise enough how important it is to ride safely and expect other vehicles to do the unexpected - ride like that and you'll be fine.
The one thing you do need to be aware of with bikes is the need for tender loving care. You'll need to keep the chain in good nick by lubricating it frequently and tightening it maybe every 500 miles (done by loosening the back wheel and moving it further back). A stretched chain will fall off if it's not tightened, and when a stretched chain falls off, the best case scenario is a chain which just falls off and you lose drive, you manage to refit the chain or you need to call a recovery firm - the normal scenario is that you're looking at a rear wheel which is locked solid at whatever speed you happen to be doing at the time the chain falls off, and obviously if that's anything above 20 or 30mph, that's an accident waiting to happen... one which will hurt.
Keeping the bike clean is essential - everything is exposed to the elements, so you need to keep things like the brakes clean or you'll find the bike rusting away in no time at all. It's especially important to clean it more regularly in the winter, as riding it on salty roads and roads full of crap is a sure-fire way to developing rust in no time at all.
The only other thing I can think of is that your usual destinations needs to have a place where you can get changed. You can ride with clothes under your protective gear (I refused to wear leather personally - much looser kevlar-based products I found far better, and kept me perfectly safe in the 2 accidents I had - the sole exceptions is that I wore leather gloves in the warmer weather and some leathery boots of some description). At work I could get changed at the toilets, but if you're going out to, for instance, a staff do at some eatery, then you're not going to impress many by turning up in dirty biking gear and helmet and immediately head for the toilets - I relied on lifts from others for such occasions.
Edited 1 time(s). Last edit at 09/08/2010 10:25PM by gav.