southern: For all my raging I really wanted to like the third game, can you point me towards which mods I should choose?
The only truly crucial mod for my enjoyment of the game is this one:
Tibbles' Class Units Reskin As I mentioned above, it makes the class units look much better and much more distinctive. Can't imagine playing without it.
Beyond that I use a number of small utility mods:
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No clouds when zooming out This gives much better map oversight
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Move orders first Tiny change, but saves a lot of frustration. This mod makes it so in your turn you get reminders to move your armies FIRST, and only then get the prompts to research and build stuff. This is much better, because you only know how much gold and bonus research you have at the end of your turn.
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Impeding Mountains This makes mountains (nearly) impassable again, like they were in old AoW games. I don't always use it, since it's not necessarily balanced, but it does add a dimension to the game. (Pun intended.)
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More colours for leaders. Making custom leaders is one of the most fun part of the game, but by default there are only a few colours available. This then leads to leaders being swapped to random colours if their colour has been claimed already. This mod largely solves that issue. Plus, it lets you make better looking leaders.
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AoW1 soundtrack for AoW3 Because I quite agree with you on the music. Again, I don't always use it, but it makes for a fun (and nostalgic) change.
There are also mods that add more racial units or further expand the hero system, but I don't use them since I'm pretty much satisfied with the base game.
(Though I should stress that I've only come to love this game after the expansions came out. Base AoW3 was... decent, but a bit sparse, and didn't have quite enough depth. The expansions not only brought races up to a respectable nine and added the necromancers, but also added the crucial mystic city upgrades, racial governance and alternate victory conditions that really add to the game's appeal.)
southern: Are there any good fanmade scenarios with a strong setting/storyline like we have in aow2?
There are a bunch of story based maps on the workshop, but honestly I've never really tried them out. I'm always playing random maps.
I will say that the (short) expansion campaigns and in particular the Eternal Lords one are great. The ones in the base game are... lacklustre at best, but the first Eternal Lords map is extremely challenging and fun, and the third is a truly epic one full of twists and alternate paths to victory and huge battles against the odds, as well as a good story. If you haven't played it yet, you should.
southern: And what sort of camera setting I should choose to make it most similar to an isometric game? I had similar camera issues with Neverwinter Nights, I literally couldn't play it because of the camera. Time to check out that steam workshop
I thought the camera was fine in NWN1, but in NWN2 it was a sluggish brute that nearly made the game unplayable.
As for AoW3: I just never move the camera from its default angle. I occasionally zoom in or out, but mostly don't bother either. This gives me plenty of oversight and lets me see what's happening. Edit: Make sure "Tactical Combat High Camera" is enabled, and "Action Camera" disabled.
The only exception is the Necromancer towns that were added in the second expansion... for some reason they have huge lighting issues that make it hard to see what's happening. Haven't found a solution for that, yet.
Whilst we're on the topic of what the game does right, though: I love the tactical combat tooltips, that explain exactly what is happening. You never have to wonder, like you did in AoW1, "is my dragonslayer bonus working on my wand of lightning bolts?" (No, it's not.) Here, it explains exactly what is happening and why.