The main aspect I like about XVideos is variety. This site has all sorts of categories, for all tastes: pro videos, amateurs, all ages and sexual orientations, roleplay, fantasies, there is literally nothing missing. And each category is very accessible - there are several clickable tags right below the page header. Plus, there is a big, visible search button to help you find exactly what you're looking for.
It's one of the top porn websites for a reason: there are over 9 million videos, all available for free. And one of the best things about this site is that it's so easy to use. Clean interface for both desktop and mobile, focused on the business if you know what I'm saying, the videos are listed clearly and the advertisements are definitely not as annoying as they are on other websites. There are some on the right sidebar and one before the video starts, but it can be skipped quickly and nothing else pops up to block your device and ruin your solo time.