Preface: All of the prices of the components are the exact prices that I paid for them when I bought them. I don't feel like taking the time to update, so they may be different.
CPU. Didn't want to burn my wallet getting an Intel CPU, so I went with an AMD with 4 GHz. So far, I haven't found a single thing to complain about with it. Does what it's supposed to, and does it relatively fast. At the moment I have it OC'd to 4.2 GHz, which is fast enough for me.
CPU Cooler. Heard lots of good things, and I wasn't disappointed in any way. I did take out the stock fan and add the Corsair PWM SP120s instead, to match my build color. PC runs at a solid 22-25 degrees idle.
Motherboard. Mostly because it matches my build, secondly because of all the features. I did have some problems with the CD software originally, but I figured it out. BIOS has crazy amounts of options, including automatic overclocking for those who don't know what they're doing.
Memory. Love G.Skill, wanted at least 16 GB and a fast speed, and these were perfect for the job. 2133 Speed, and a Cas Latency of 9 to boot. Haven't failed me yet.
Storage. Went with the 850 EVO for a boot drive, super reliable, boots up my PC in 5-10 seconds. I went with a small 2.5" extra drive because of the case (I'll explain that in Case section), and I use it to store most of my big games/movies and all of my recordings and captures.
Video Card. If I'm going to put my stuff on YouTube or Twitch, I need the power to go with it. Went with the MSI GPU because of the looks and to match the rest of my build. Works very well, haven't had a single game that won't play on Ultra at minimum 60 FPS.
Case. I originally bought the case for the fan that came with it, but I ended up replacing it anyway. Though, it does have red lights on the front of the case besides the fan. The drive bay in the case has a 3.5" cage with 4 bays, and then 2 2.5" slots on top of that. I ended up just taking out the 3.5" cage just to make my build look cleaner, and to make it look less messy since I was just getting 2.5" disks.
Power Supply. I was looking for 750W and Modular, and this one was the cheapest. Don't get me wrong, it's definitely built well, and the PHOTON logo on the side looks pretty cool in my opinion. The cables are a little hit and miss, especially the 8-pin CPU cable, but I made it work.
Optical Drive. Works. Need more than that?
Case Fans. I went with Corsair because of their reliability, and to match the case brand. 2 140s in the front, a 120 for exhasut, and the two 120 PWMs on my Cryorig H7.
Fan Controller. Looks great, easier than going into my BIOS if I want to change my fan speeds. Also, red LEDs are a plus.
Elgato Game Capture. I use it for my Xbox One, works beautifully, and looks pretty sharp in the case instead of outside it connected to a mess of wires.
And of course, a lovely string of lights to make my build look even more obnoxiously red.
Pictures taken with HTC One M8.