Your favorite personal weapon?

My favorite would have to be Felicia's Plate. This is mostly because her's is really the only prf weapon that I use on a regular basis, but it's also because she's absolutely amazing. The fact that she can Glacies bomb extremely tough armor units like M!Grima, or Hector variants, with absolute ease makes the weapon worth upgrading.

Exalted Falchion & Sieglinde. Being able to stack your own boosts is disgusting and fun. Expiration is a good one too. Built in DC, no downsides (Besides not being able to refine... but let's be honest that'd be excessive), and being on Grima, the final boss of Awakening.

Durandal, because it's a dumb oversized sword (at least in blazing blade it was), and I love that stuff. Also, the name is just awesome.

Raijinto! I love the electrical effects and the DC on it, and I wish Rajinto crackled more when it did its animations.

Also, Dire Thunder. If it counts? MAGIC INTENSIFIES!

aesthetic-wise, I've always been a fan of Urvan. It just this big, nice looking axe. But nothing overly eleborate.
Very much fits Brave Ike (And Greil)

Gameplay-wise, pretty much any weapon that Hector or Ephraim have turn into gold. Omnibreaker and reckless assault.

Gotta give a special mention to unique tomes in general, they're often so damn amazing looking.
My favorite being the space lazer (Wargod's tome) and Loptous the dark dragon.

Edit: I just need to mention that they do all versions of Falchion a lot of justice.

Summer's Breath. Its four effects are beyond ridiculous, its effects are pretty cute, and it's a dragonstone on a popsicle stick, perfect for our British Summer Young Dragon.

Animation: Gleipnir and Cymbeline. They harness the power of black holes, meteor showers and the freaking sun itself.

Effect: Laevatein. It's a Blade Blade.

BLAZING DURANDAL. HEAVY BLADE + ATTACK+3 = BEST WEAPON BOIS

For me it's between Felicia's Plate and Garm. Adaptive damage is really nice, forced double on both phases is broken.

Marth's refined Falchion is great. I like how it's one of the few supportive weapons in a sea of offensive refines, and it's going to be more useful than any other refine because it is really simple to use and slappable on any team composition.

In terms of pure power, I love Lilina's Foreblaze. Chill Res 3 + Death Blow 3 is a simple combination, but it's just so fun to play with.

... I guess I just like refines with simple effects.

Mechanics: Dark Mystletainn is crazy.

Appearance: Cymbeline.
Tomes definitely dominate this category, but my favourite-looking lump of metal is probably B!Lucina's lance.