With Slickr Flickr, the photos displayed can be selected by tag, by photoset, by group pool, from favorites, from your curated Flickr galleries, by date range, by orientation and by size.
There are three types of display: a gallery, a galleria and a slideshow.
Flickr Galleries
Slickr Flickr allows you to display you Flickr photos in a gallery which is a series of thumbnails with a lightbox appearing if you click the photo. You can vary the size of the photos, the thumbnails, their sort order, captions and descriptions; in fact about 30 different parameters in all.
Flickr Slideshows
You can also use a galleria, which is a large photo with thumbnail below. Galleria comes with a free theme classic but there are other premium galleria themes available.
Flickr Slideshows
Or you can display a slideshow at various size. The slideshow below excludes portrait format photos as a slideshow looks better if all photos are of the same size.
Click for more on how to use Slickr Flickr.