Links are still playable in Sky's large form and they don't work all that diferent when she changes size, but I understand how less crazy she is with putting them out and pulling them back when she's normal/big opposed to tiny.
This is basically what I do. Skyscrape is a pseudo-flexible hero. She can do a bunch of different things, and change depending on the situation. I tend to wait until I have at least 2 form chaging cards + cards for the first form before switching. For example, if I intend to go Tiny, I'll try to make sure to have a card that switches to Tiny, a card that switches to either Normal or Huge, and some cards relevant to being Tiny before I switch. This doesn't always get to happen, but this way I get to stay flexible. I get to switch into Tiny and do a bunch of stuff, but then I don't have to worry if I need to quickly switch out to do something else.
I'm with PhantaSkippy and MindWanderer on this one. A play-by-post, tedious as it sounds, is the best option for me.RPoL sounds good though, and perhaps this would be better off with a new thread?
I love characters where you feel you're building up to an awesome mega-turn, and Tachyon and Unity do that for me.
Besides, they have the best flavour text (apart from possibly Sky), Tachyon's a super-smart scientist and Unity makes awesome robots with her mind and I am so down with that. Also I had the biggest grin when I found out Tachyon is gay and it isn't in any way a big deal, when so many queer characters in other stories have basically no personality traits except their non-straightness.
Tempest was the first hero I played so I have a soft spot for them, and they are just too adorable with the dog and the eel but awesome and powerful with all the lightning stuff too.
And AZ is always fun because I like having to make difficult decisions about payoff vs self-damage and seeing how far I can push that before he explodes. His personal growth speaks to my soul as well.
There are lots of SotM characters that I like as actual characters but don't enjoy playing as much. Bunker has power armour which is a cool thing, but playing him feels so focused around modes that aren't that much fun to be in for me. Time-travelling cowboy? Awesome! But Chrono somehow doesn't satisfy me with all the plinky damage (doesn't make sense when I love Tachyon, but there you go) and the bounty cards I'm continually forgetting I have out. And I love bards and Argent's backstory is super cool, but even though I worked hard to grok his deck I just find him more work than fun to play with all the hoop-jumping you need to do to make him really shine.
But generally it's hard to pick favourites because they all have different things that make them awesome.
This is what I like about Tachyon. I spend the entire game counting my burst count and getting excited, and then Boom!
Hear Hear, the Truth has been spoken
All that hoop-jumping results in one of those big mega-turns, though. In fact, if there isn't much destruction, AA could have multiple mega-turns in a row.
I like Argent for similar reasons to AZ in that while they work really awesome once you build them up to get their good turns, it's usually not that hard to just throw down a card and still get to have them do something.
(I had one game against Deadline that was cake because it was pretty much just AA using Sarabande every power use he got.)
If I had to pick a favorite hero, it’d be the Naturalist. I’ve always loved shapeshifters … l like being a druid in D&D-type stuff. I especially love the Hunted Naturalist, not just because he can do some great gameplay stuff, but I like imagining him as like half-crocodile, or a combo of all 3!
Unity was one of the first expansions we bought and she quickly became a favorite back then. And is certainly still a favorite. Love her bot army!
Chrono-Ranger is also up there, as are Knyfe, Omnitron X, Argent Addpt, Tachyon, Tempest, Captain Cosmic and Absolute Zero.
This is all pre-OblivAeon … Can’t wait to try out those to see if any move up to the top of my list.
Don't think I've mentioned this yet but apart from the ones who are my favourites to actually play, my favourite hero power type thematically is Writhe with all his creepy-shadowy-darkness-void-will-eat-your-soul powers :D. But I also enjoy playing him as well. So there's that :).
Nightmist, Absolute Zero, and Benchmark. 
Nightmist is the most underrated character in the game, in my opinion. You just can't be afraid of doing yourself damage. Cards will get you the relics and spells to control any situation, and heal yourself to boot!
Termi-nation AZ has a lot of combo-opportunity in the right team, but for consistency, I like Freedom Five the best.
Benchmark (especially his 'and Demand' variant) is a very powerful character than can be nearly unstoppable when properly equipped. I've got him to the point where every turn he was using fly-by to do 2 damage to 3 targets (it then went back to his hand), allowed another player to use a power, and then healed himself for 3-5 every turn.
My favorite is probably Haka, followed by the Naturalist, Legacy, and then Tachyon.
Of those who are not part of the OblivAeon wave, it's a rough tie between Omnitron-X, Argent Adept, and KNYFE. I haven't been able to use the new ones much yet, but I think that Harpy and Benchmark will be up there once I get some games with them under my belt.
Since OblivAeon is released my fVourite is Stuntman, then Chrono Ranger, then KNYFE
Can you tell I like card plays and DPS?
My favorite representation is Parse
My favorite hero concept is... also Parse.
Fascinating. How do these three go together.
Favourite hero ever: Akash'thryia.
To avoid spoiler I will just say that what she does is fantastic and fun.
Then I will put in a tie the Hunted Naturalist for his polyvalence and Fugue Parse because if I could marry a card it would be Critical Multiplier.