This is my first PC build and I've really enjoyed putting it all together. I've upgraded from a 3 year old laptop that I used to do all my work on, with an initial budget of £800. It will mostly be used for graphic design, that is working with Adobe CC applications; more specifically, I'll be working a lot in Photoshop, Illustrator, and InDesign, while occasionally using Premiere Pro and After Effects. As well as this and general use, it will be used for light gaming from time to time too.
I went for the i5-8400 because it's a pretty snappy CPU that was within my budget, and I'm using the stock cooler (for now) as neither the CPU or the board support overclocking. I chose the board as it supports integrated graphics as I was at first waiting to upgrade later. I went for 16GB RAM as it's important for my software and it's nice and fast. For the storage I've split between SSD (240GB) and HDD (1TB) to save on costs; I'm using the SSD for my OS and all applications while the HDD is for everything else and as a bit of an archive. Going from a 5200rpm HDD (laptop) to an SSD has been mind blowing and the speed increase feels like the biggest upgrade about the whole thing. With the GPU I got lucky; I didn't have room in the budget so I was going to wait until later, but a friend had a 750 Ti lying around and let me have it for free! It's a pretty old card now, but as I got it for free I'm not complaining. I chose the case with very little research as I simply liked the look of it (ignorance is bliss), the PSU is the cheapest gold rated semi-modular model I could find, and I added the wireless adapter and optical drive because why not.
In terms of upgrades, I plan to add some more case fans very soon, as there's only 2 at the front at the moment, and I'll probably swap out the CPU cooler while I'm at it. I also plan to add more storage, preferably another SSD, and eventually I might consider upgrading to 32GB RAM. I also want to upgrade the GPU as soon as I can afford it so it's more up to date and higher performance.
So far everything has been working brilliantly and I'm very pleased, so I'd love to hear what people think. Plus, if you have any suggestions for the upgrades I've just mentioned, that would be great too. The only thing I would do differently when upgrading or building another PC in future is to research even more thoroughly. For example, while I'm pleased with the case I've chosen, I think I could have done better with hindsight.