Really Lazy Bear 
Nightcore's so fucking fun especially with Bass Slut and Eyes Half Closed, but the problem I have with it is that it makes my head hurt the longer I play it. It also makes me thirstier and hungrier faster, kinda. What's cool though is that it distorts my perception of time. What feels like 4 hours was only about 2 or so hours in real life.
Mirror + Random adds to the fun too. Jump patterns most of the time don't make sense and you have to make sense of it all in around 300 or so milliseconds. It's like a puzzle you have to solve in under a second. Some streams in some beatmaps form these shapes. Most of the time they're squares, sometimes they're triangle, sometimes even pentagons or hexagons lol.
Idk. It's all so fucking fun.