That’s a good question!
There’s not a lot of female denial orgasm specific porn, almost always the women are made to cum in the end – which is why gifs work well as you’re only getting a snapshot of a scene and you can imagine however you want it to go.
I guess it’s really whatever takes your fancy. Try not to get stuck in a rut, explore the different categories on a site like pornhub or spankwire. The stuff from kink.com is often good, some of the ‘Training of O’ series are very hot.
I honestly don’t watch that much porn, I think it’s better to be creative, which is why I love the variety you can find on Tumblr that you can then add your own twists to.
Try some art and illustrated erotica too, just yesterday I posted from this fabulous blog: http://slippystuff.tumblr.com/ and the artist also has a blog of other erotica they rate highly: https://slippysmut.tumblr.com/. Just pick one you really like, and make up your own story for what’s going on – don’t just rely on lazy porn producers to do it all for you. Use your mind and creativity when enjoying porn and it will make you a better and sexier lover.