So what's the answer here? How do I truly filter out the themes that don't support slideshows? How do I hone in on a theme with the attributes I want, such as slideshow, when the "featured image" filter actually seems to filter out many themes that do support a slideshow? Is there a list of themes that can do slideshows or something to that effect?
Also, with the themes that say they allow you to post a featured image header for your posts, in addition to the one at the top of the home page, is that something I should be worried about being listed on a theme, or is it something I can just embed in HTML (or java or which is which) for each post even in themes that don't list "featured image header?"
And what about themes with sticky post, or post format, should I be making sure I pick a theme that has these things, or not worry about it because I can always do those myself in CSS or HTML even if it's not listed in the theme attributes?
Maybe, in terms of theme functions like sticky post, post format, adding a photo slideshow, and all those things, if someone could post a list stating which of those things can be done in CSS even if your theme doesn't have it by default, and which ones you need to make sure you pick a theme that has them as default if you want to use them, that would be very helpful, so that myself and others can know which ones they have to make sure their theme has to start with, and which ones they can create on their own, so as to not limit themselves to the very limited selection of themes that actually have all these functions built-in.
The blog I need help with is puckcircle.wordpress.com.