I am seeing more flash used in the templates and while I do not mind flash in sites, I feel this needs to be able to be filtered. It takes time to comb through these templates looking for the right layout and design. Most clients I work with do not want flash due to its lack of support on mobile devices. This might change, but regardless would be helpful if these were labeled or tagged.
Usually the ones with flash also have a version without it. For example Kriesi’s Display theme has a Cu3er and a jQuery version. Phones are starting to support flash (Android, Windows Mobile), so it shouldn’t be a problem for much longer!