Hmm, I've grown rather fond of the recent Red-Eyes fusion, Meteor Black Comet Dragon. Inferior to the other Red-Eyes fusion, Archfiend Black Skull Dragon? Yes, quite. Looks hell of a lot cooler? Yes by a mile. I'll summon this bad boy over the other just because he just looks so damn cool :lol

For Synchros, I gotta go with the old gold standard, Brionac, Dragon of the Ice Barrier. No one used Ice Barriers, but 2 of their 3 dragons, Brionac and Trishula, saw major play because of how useful they were. Brio in specific, and I love the thing. Sucks that it got banned...
(I also have some fond memories because when I played in tournaments, I ran Plant Synchro during Brionac's hay day, so I used him quite a bit :lol)

For XYZ, hmm...A little more difficult. I guess I'll go with one of the lesser known, but quite useful ones. Number 37: Hope Woven Dragon Spider Shark. Only really useful to water monsters, thankfully I ran a water deck, Gishiki, so he saw quite a lot of play from me due to his ability to summon a water monster from the grave when he was sent there, himself. Made for ritual plays a lot easier~

Junk Warrior, Red Demon's Dragon...

Honestly, I'm not a big fan of generic ED monsters in general, so I don't have a lot in that regard.

Recently, I've become a big fan of Kali Yuga, but that's, again, because I love D/D/D's.

EDIT: Oh God, no, I'm getting Brionac flashbacks... everything wrong with early Synchros in one package. So much bad design, this broken piece of nonsense. Still not as bad as releasing Goyo Guardian in the exact same pack as Gaia Knight, the Force of Earth, which is literally a weaker version with no effect... why?

You know Brionac and Goyo are getting erratas, right?

Goyo's doesn't matter, mostly cause Goyo barely matters.

Brionac's, OTOH... Eh, it still targets so I guess it's alright...

Actually, looking through some of these erratas... several of them are just pointless, especially Rescue Cat. It basically changes nothing about what made it a degenerate card in the first place. Future Fusion is almost as bad as it's always been, but not quite. Still the best self-mill in the game though.

Yeah that is why I only used it to summon Gaia Drake, The Universal Force.

I am not well-versed in the card game but I really love the design for Cyber Commander and Skull Mariner.

Yeah, a lot of normal monsters have awesome art work.

I got my second Number card. Number 100: Numeron Dragon. That's amazing for me.

From a booster pack?

Yeah. One of those "Dragons Unleashed" booster packs.