Do you keep a UV filter on all the time?

Over the years, although I've been careful, many UV/Sky filters have been scratched and have needed to be replaced. I'd rather do this than replace the front element or the lens!
I like to keep the front element in perfect condition because the pictures will be better and the lens will fetch more if I decide to sell it.
I like to keep the front element in perfect condition because the pictures will be better and the lens will fetch more if I decide to sell it.

I keep the lens hood on always and lens cap apart from when actually taking photographs. I do not use such filters as I have clear evidence that they can deteriorate images in many circumstances. I used to used a filter 8-10 years ago before I knew better. I have never scratched a lens or a filter. Of course if I was operating in a dust storm or at a speedway race I would add protection but this has not yet happened. I did recently attend Motocross and it was not necessary to add a filter because the bikes were coming towards me.
The first time I became aware of the problem I was at a studio shoot and noticed my images on the back of the camera were soft. I then realised that I had left a plain filter and polarising on from a previous outdoor shoot. I removed the filters and image were pin sharp again.
Dave
The first time I became aware of the problem I was at a studio shoot and noticed my images on the back of the camera were soft. I then realised that I had left a plain filter and polarising on from a previous outdoor shoot. I removed the filters and image were pin sharp again.
Dave

I am very surprised that some folk do keep them on - as others have said the lens cap and hood should give the lens all the protection it needs and the filter, no matter how well perfected it has been, is still cheap glass in comparison to the lens which has been so carefully produced to give the best possible images - and yet you put cheap glass in front. To me that really doesn't make any sense.