You walk into Ulduar and you already know what's going to happen. You remember where to stand on Hodir, the moment Mimiron switches phase, and you can explain the mechanics to a newcomer without opening a guide. For one player that's precisely the reason to come back to Wrath of the Lich King. For another, it's the reason not to. Out of that fork grows a choice that shapes your experience more than rates do: pure blizzlike, or a server with content of its own.
What the word blizzlike actually stands for
Blizzlike is an attempt to reproduce the original as it was: the same item stats, the same quest text, the same loot tables, the same class balance along with all its distortions. The main value of that approach is predictability. A guide recorded many years ago still works. The talent build you remember still works. And if something behaves differently from how you remember it, that's a bug, and it goes into a ticket rather than being debated as somebody's design decision.
One thing is worth admitting here: absolute blizzlike doesn't exist. Every core is a set of scripts written by people, and some encounters on any server differ from the original in small ways. So it's more honest to treat blizzlike as a direction rather than a certificate.
The flip side is obvious and isn't going anywhere: you've seen all of it already. A first run through Naxxramas can't be repeated, because surprise doesn't reproduce on demand. A month or two in, the game turns into the routine of weekly resets, where the interest is held not by the mechanics but by the people next to you.
What custom content gives, and what it asks for in return
Custom content is everything the original didn't have: new modes, progression systems, zones, races, mechanics layered over familiar dungeons. There's exactly one upside, but it's a big one: it's the only way to find yourself once again in the position of someone who doesn't know what comes next. A familiar dungeon under new conditions makes you think again instead of remember.
There's exactly one requirement too, and it's a substantial one — trust in the people doing the balancing. Custom means the decisions about difficulty, rewards and ability strength are made not by a studio with years of experience but by the server's team. Balance mistakes here are inevitable, and the question isn't whether they'll happen but how quickly they get fixed and explained. What's worth looking at is the change history and how the team talks to players when something breaks.
The second consequence is smaller but noticeable daily: old guides stop being exhaustive. They still hold for the base encounters, but what a particular affix does or how a season's reward is calculated is something you'll have to find out on site, from people and from the server's own descriptions.
Which one suits whom
More likely blizzlike
If you're coming back for a specific memory and want everything exactly the way it was. If you play infrequently and aren't willing to spend rare evenings learning new rules. If you collect achievements and collections where comparability with the original matters. If it irritates you when a favorite class behaves differently from how you remember it.
More likely custom
If you know all the raid content by heart and are bored because of it. If you need a reason to log in between resets. If you like progress being measured not only in item level but in rating, seasonal rewards and a difficulty you picked yourself. If you're ready to read patch notes and argue about balance instead of relying on memory.
How it's set up on Valor
Valor is built on base WotLK 3.3.5a, client build 12340: the dungeons, raids and 3.2 content with Trial of the Champion and Trial of the Crusader are all in place. Layered on top of that is what the original never had: Mythic+ keystones with levels one through twenty-five, affixes, a timer and a rating; a battle pass whose Season 1 is called «Trial of Valor»; mount crafting; a hardcore mode for those who want higher stakes; mini-games like the «Shooter» in beta and a Dota mode. A story of its own is the custom races, which change the very choice you make at character creation.
The point of that combination is that the familiar stays familiar: the leveling route, the raids and the quest text haven't been rewritten. The new material lives alongside it and gets switched on if you want it. If you'd rather get to grips with the pure approach first, it's described in detail on the blizzlike WoW server page — and only then decide whether you want another layer on top of it.
