All my filters are Hoya or B+W, I use them outside when I feel it's appropriate, Windy, lot of dust or smoke, shooting surfing etc. Always remove them shooting indoors.
I've had a few stuck Hoya filters too, usually when I have left the camera in the bag for a few months LOL.
A trick for removing stuck filters: use a shoe. Press the tread of the shoe flat against the front of the filter, and use it for both grip and leverage. It's not guaranteed to work, and could cut a shallow circle into the tread of your shoe, but I've used it to take off a couple of filters that would otherwise have needed pliers to remove.
(Pliers almost invariably means breaking the glass.)
I will use filters that add to the image – I have a couple of C.Pol around here somewhere, two contrast filters for black and white photography to fit my Ikon lenses, and a couple of ND filters as well. All of them are B+W, but I've been impressed by Sigma's DG filters as well.
I actaully use the backside of a drink coaster that has nice soft cork on it, press it flatly against the filter and slowly turn.
Ok count me in the anti-filter movement... I'm removing my filters as of now.
Although it reminds me of a funny story when I was mucking around with my brother, and taking photos of him with my D50 and kit lens. He threw a soft bean bag at me but it hit the lens square on. It damaged something inside because the zoom mechanism was stuck can I couldn't budge it any more...
Good thing it was only a cheapie kit lens - managed to have some fun disassembling it...
I have not been using filters on my fisheye and 14-24. Can I join the no filter bandwagon if I keep UV filters on all other lenses?
When I watch my wife handle the lenses, I am glad that there are UV filters on. I realy do not like the thought of removing fingerprints from the front element. Pray for a clean fisheye.
I had UV filters on all my lenses. I bought a nice new Sigma 17 - 50 for my Sony alpha 300 a couple of weeks ago and took it for a short trip. Took some nice photos - without a filter for the first time.
I got back and to my horror found a scratch on the front of the lens. Only small and at the edge, but feel bad as it is brand new.
Never again. This lens now has a Hoya filter on it like my others. I'm more likely to sell the lens some day than make any serious money selling photos so I would rather protect the lens than gain a couple of pixels on a photo (by removing the UV filter) which are not noticeable on a computer anyway.
Probably we could protect our lens by having UV filter without affecting our images when we shoot it. This is when we used a MultiCoated Filter UV filter or any kind of filter. Ordinary filters have this hazy/cloudy effect on our image but when used a multicoated its like you don't have this kind of filter added to your lens. This is because multicoated filters are coated with the same coating does your lens have. So it really does not affect you image.