I am a Fire Emblem fan but honestly I enjoyed Advance wars a lot more. Fire Emblem Radiant Dawn was way too difficult and very unbalanced. I love mostly all of Intelligent Systems games. But don't get me wrong I am glad that Fire Emblem has gotten to the point in popularity where Nintendo is releasing every game over here as before you were worried whether Nintendo was actually going to release the Fire Emblem games in the states. Now it's just this nonsense which you see in the thread.
I've always loved both series, and I've been wanting another Advance Wars game for over nine years now. My friends and I used to play Dual Strike's multiplayer on my DS (we'd pass it around) back in high school, so it holds a lot of fond memories for me. I feel that Days of Ruin was a definite step down due to the drastically darker shift in tone, but it shouldn't have been the death of the series. I also agree with Radiant Dawn being unbalanced, in that there are a ton of characters that have absolutely terrible availability and thus don't have time to actually be leveled up properly, making them permanent benchwarmers. I also hated how they essentially gutted the support system and made every single conversation generic and pointless. Don't get me started on how long it takes to sit through enemy/other unit phases in it, too - I used Dolphin last time I played it solely so I could use the fast forward key to avoid having to wait multiple minutes for some turns.
I'm also willing to fight for the title of the biggest Fire Emblem fan around here. I've played all of the games in the series, including the Japanese ones, and I tend to buy up everything I can find that's related to the series (though I'm terrified of having to sell everything if I can't find another job - if I have one piece of advice to offer to those younger than me, it's to not go to college without knowing what you want to major in just because everyone pressures you to go). Over the years, I've collected two of the official artbooks, a Lucina Figma, both Awakening and Fates' official soundtracks, all of the English physical releases (including the Fates SE), both of the special edition 3DS bundles, some of the Tellius-related Cipher cards, and all of the related Amiibos.
Luckily I have a lot of Gamestop credit saved up and could nab Echoes' limited edition from them, but I have to say that Gaiden was easily my least favorite of the series when I played it and I don't know if this remake is really going to change enough to make it more enjoyable for me (and I also wonder how many of the post-Awakening or hell, even post-Blazing Blade fans are going to play it and hate it due to how different it is). It's practically the only video game-related series I really spend money on any more, though, so I don't feel quite as guilty obsessing over it.