Favorite Synchro monster?

[Kira Yoshikage]

Mine would have to be Stardust Dragon. Despite my love for Clear Wing, Blackwings, Infernities and Quasar, Stardust remains the most iconic card of the 5Ds era. 2500 atk is pretty solid. Also, its inherent ability to protect anything from destruction by card effect and dodge any other threats for a turn is amazing. Its level makes it easy for any good Synchro deck to make it, and it is one of the most beautiful monsters to ever grace Yu-Gi-Oh! In my opinion. Yusei Fudo is also my favorite main protaganist. I also like Wind attribute monsters.
Other forms:
Majestic Star Dragon
Shooting Star Dragon
Stardust Spark Dragon
Shooting Quasar Dragon
Sifr
Stardust Dragon - Assault Mode

[Stardog]

I think my favorite Synchro monster would have to be;

Beelze of the Diabolic Dragons

[You must be registered and logged in to see this image.]

I was originally going to answer Arcanite Magician but I didn't want to possibly pick what might have been Sketch's favorite Synchro monster. In order my favorite typing is:

-Warrior
-Spellcaster
-Dragon
-Zombie
-Machine

Anyways. Even though it might not be Arcanite Magician, Beelze is probably my favorite Synchro monster. Fantastic ATK/DEF, and it can't be destroyed in general. Personally I like to use Beelze as a defensive option since my opponent can't run it over and has its utility with Scrap Dragon.

[Flip Flapper]

to me it is easily red nova dragon, while hard to summon it has an amazing atk power and cannot be destroyed by card effects and it gains 500 atk for each tuner in your grave, it can also dodge being destroyed by combat with its effect to banish itself and negate an attack

[StardoostLegend]

I too love stardust dragon, back when I got into yugioh during the 5D's era I loved when Yusei would something him, When I got into DN I had first built a crappy stardust dragon deck and my username also says XD

[Guest]

[You must be registered and logged in to see this image.]

[Khina Bree]

Appreciate the thought Doge. But my favorite Synchro monster is actually Junk Warrior

[Kiernan]

[You must be registered and logged in to see this image.]

[α27theDemonKnight]

[You must be registered and logged in to see this image.]
Red Dragon Archfiend
For my favourite synchro I was conflicted between Red Dragon Archfiend or Arcanite Magician but in the end its RDA after all. Jack Atlus was one of my favourite characters in 5Ds (god I hate his english dub voice as much as I love the jap dub voice). His theme would get me all fired up and whenever he brought out RDA I would get really excited and yell put along with him ABSOLUTE POWER FORCE!!!!! I even yell that when attacking with RDA. The feeling of pure power and destruction is amazing! Well I entirely love the design of Red Dragon Archfiend as well. It may me a Dragon but it's still an Archfiend so that's where my partiality to this monster lies. If for some unexplainable reason someone desides that I should be a dragon I would want to be none other than RDA.

[Sponsored content]