I very much enjoy anything that happens after players allow me to play/keep one of my 'signature cards' around. These may not be the most powerful cards ever, but I love them and will bend a game in half if I'm allowed them in the right circumstance.

Most recently, tapped out for pet card Tempt with Vengeance during my turn with a pile of good stuff in play. Had a Cryptolith Rite along for the ride. Opponent went to board clear. Was able to instant speed respond thanks to Alchemist's Refuge by casting a Reef Worm + Echoing Equation. Everyone was dead by massive fish damage the next turn.

Jace was the original 'main character' planeswalker, since he was thought as 'most relatable' for the majority of the playerbase. Which should be telling of what WOTC thought of their playerbase, really. He was a sullen, withdrawn pile of power fantasy tropes wrapped up in a mind-mage flavored shell.

He was originally in a relationship with Liliana, mostly so she could get information (hooking our nerd up with the hot chick? Nothing like a little wish fulfillment in our power fantasy, subtle WOTC...). Needless to say, it didn't work out. Mostly because they're both not great people who weren't really invested in a real relationship.

Around Ixalan, they started giving him a legitimate character via an amnesia overhaul. This is when you see fewer outright mill mechanics on his cards and get a lot more mention of him using illusion magic in stories.

He then, through that Ixalan storyline, ended up in a relationship with Vraska. It's not my favorite relationship...I think it's poorly fleshed out romantically, but eh...it's a lot healthier than his previous relationship.

I've never heard about Jace and Nissa. I only know about Nissa being linked to Chandra, and that was mostly them flirting instead of a real relationship.

I do like how Jace's character changed in Ixalan. He's made an effort to interact with other people, especially the Gatewatch, and has become more aware of his own shortcomings (he's aware that he's not the most adept at empathy and leadership/social situations, for example...though he still puts forth the effort and relies on others).

I would neither consider him a 'Chad' (though I am really not sure what makes a Chad) nor a 'player'. He does not dump a person exclusively to get with another, nor does he date multiple at once. His motives aren't shallow, and these relationships happen over a span of years.

I usually just make token copies/clones of Archaeomancer - type cards if I want to recur the heck out of instants/sorceries. Add any red and blue fork effects that duplicate spells like Reiterate and green for all the mana ever and you got it. Jodah lets you drop things like Nyxbloom Ancient faster, but I think Kenrith, the Returned King also gets a nod as a way to do something with your mana in absence of your 'secret commander'. He even draws cards to find it!

Also for insight on the VOW decks...

Millicent, Restless Revenant relies on you amassing a ton of spirits on-board to really do her thing, but the engine feeds itself. Once you have a bunch, they're monstrously hard to get rid of and keep multiplying thanks to her ability. She snowballs very quickly with steady card draw. I modified my Millicent with a few more Bident of Thassa effects to really take advantage of the plentiful bodies to keep the cards coming and she can explode and become a menace very quickly.

Strefan, Maurer Progenitor is a beatstick-y guy on his surface...he wants you to cheat in giant vampires. But there's trickiness there too. Making blood tokens with small damage sources like Leechridden Swamp, and you can easily make the deck more of a reanimator/graveyard matters deck or even have an artifact matters subtheme because of the blood tokens. Good thing Bloodline Necromancer is already in the deck, he's so good in here!

Honestly, all 4 of them are really solid decks that can punch above 'precon' weight. Choose the tribe that interests you the most.