I am answering these in reverse order :P
5. Which titles have you played?
Path of Radiance, Radiant Dawn, Awakening, Birthright, Warriors, Heroes, Shadows of Valentia, Three Houses, Three Hopes, Tokyo Mirage Sessions, aaaand Engage
lmao I've completed PoR, Awakening, the main quest of heroes, the Lions route of both houses and hopes (not the true ending tho, sorry Rodrigue), and I'm chipping away at everything else. I'm a true master at playing everything but not actually playing, yknow?
4. Which was your first game? What was your first impression, and how you feel on it now?
I watched the smash bros trailer for robin and lucina and it literally changed the trajectory of my entire life. I ended up begging my parents for awakening and got it for my 15th birthday. It altered my brain. It's everything to me. I adore it. It's still my favourite. It's still the one I fall back on. I'm writing a novelisation fic. I've been worldbuilding so much in the background. Awakening was something special. It still is.
5. Any criticisms about your favorite game, or anything you would change?
there are some characters that I would love to see have supports. There are some support chains I would change entirely. There are some lines and moments that I cringe away from and wish didn't exist. It's far from a perfect game. Excellus is there,
Also. Plegia. I'm giving it so much nuance.
aaaand timeskip designs would've been so nice: Chrom and Lissa, especially. Everyone else is a whatever but those two specifically deserved them.