The Souls series is an entertaining series, though it does have its share of problems. The biggest one is the group of fans of the series who have to show off how big their Souls dicks are. Thankfully, even if they're very vocal, they seem to be a minority. I have other issues with some gameplay mechanics for the series, specifically DaS1, but I've already gone into detail about them in other threads, so there's no need for me to list them here.
Here's how I got started: my very first exposure to the series was actually seeing the cases for Demons' Souls and Dark Souls for PS3 at a friend's house. Didn't think anything of it at the time (that was around the end of 2011/early part of 2012), but around the latter half of 2012 I started hearing more about Dark Souls and how hard it was. Hadn't really heard about it much online, but then I didn't frequent video game discussion boards and news websites consistently until 2014. I was more focused on getting Mass Effect 3 and MGR: Revengeance in that period of time. It wasn't until I started hearing about it on a few Two Best Friends Play LPs towards the middle of 2013 that I got more info from it from fans who played the series. Watching more videos about it, namely the "This is How You Don't Play Dark Souls" video that calls out DarkSydePhil on his BS, as well as PlagueofGripes's LP/"Lorethrough" of the game made me finally come around to buying it for my 360.
It was hard, but enjoyable, if not frustrating at times as I had to change things up while I constantly deleted and started new characters until I got a class that fit how I wanted to play. Until I got to those fucking archers in Anor Londo. I forgot how many times I tried getting past that part only to die, and how many times I tried different approaches and strategies, as well as watching videos on how to do so. But eventually, the game stopped being fun as I was effectively brickwalled off from progressing by this one part that was poorly set up. I quit it, turned in the game for store credit, and never regretted the decision. Especially after I watched the rest of PlagueofGripes's LP at a later date and saw that there was going to be more utter bullshit ahead.
2014 came, and Dark Souls 2 was about to come out later into the year. While my experience with Anor Londo soured things for me a bit, I wouldn't let it stop me from enjoying a newer entry that had likely taken care of the biggest issues that I had with DaS1. I got a digital copy for PS3, and played through it for about five or six hours on a couple of different characters. Then it stopped working one day.
Here's why: I got my PS3 used from GameStop at a pretty big discount, due to trading in my 360, taking advantage of a special trade-in offer for consoles, and using a coupon, all around November 2013. Didn't bother with a store warranty, because those are just cheap attempts at cash grabs. I had that PS3 for about six months with no issues arising; then around May/June of 2014, it started having issues with a few games I had, and wouldn't download or install other games. I couldn't get a full refund because I had it longer than GameStop's return policy allowed, and I couldn't get it checked out and repaired by GameStop because I didn't buy the warranty. Plus, I didn't have the money to send it to Sony to get it repaired. So I was essentially screwed out of playing Dark Souls 2, inFamous 1&2, and a couple other games. Dragon Age: Inquisition didn't work either, though I'm still uncertain if it was due to the PS3 itself or just because I got it during the period of time where there were so many connection issues due to DRM.
Never got around to playing Demon's Souls, and since I don't have a PS4, I can't play Bloodborne. :P
As for Dark Souls 3? Feels pretty solid, though I still have some issues with the fact that some tough boss fights feel like they're tough because the boss AI will decide "Nah, you're not going to win now" on a whim, regardless of how prepared and skilled you are. Like with other Souls games, there's times where I feel the game just cheats with enemy encounters and a few boss fights. And then there's other times where I've seen boss fights online where the player is having a lot of difficulty, and when I fight that boss, I only have one or two deaths. Aldrich was a good example. I saw the fight online, saw the hail of arrows, saw the crystal homing magic, saw the massive soul arrow, saw the fire spear, and I thought "Whoa, that looks harsh." Then I fight him, and on the third attempt, he only hits me a couple of times. Though he did cast that Arrow Hail right as I killed him, and I got his soul and drops as the attack killed me. That was pretty damn funny, and I wish I had been streaming when I fought him. XD