High cost of colour sheet film
I'm gladly spending $20 a sheet for 8x10 chrome right now. I love chromes and 8x10 format is my new baby. I know based on past experiences with 4x5 that I will take more time to find that perfect shot because of cost. But the high cost is what makes my images great.
More importantly for me, it's not only the look and experience of shooting film, but the fact that I am capturing real images that can be viewed without the aid of technology at any time in the future. Film is a true archive. Migrating a bunch of 1's and 0's are meaningless unless you have the correct hardware to view them. The digital image doesn't exist in its raw state, where as it does with film. So for that, I will alway be shooting my most important memories with film, regardless of cost.