Printing and scanning. I only print like one thing every couple months and scan things every 6 months, but a backlog is growing. My printer is over 10 years old but it worked well on Windows. Despite their site saying it supports Linux I just can't get it to print or acknowledge any data is being sent. I'm contemplating a newer printer since deals are going on right now.
Update: Woooo! After a few weeks of fiddling with the install scripts and CUPS config I got something to print via Linux! That being said I'm upgrading, not giving up, to a new EcoTank printer.