Man, I'm having so much fun with this game, but of course, that's a given since I really like tactical rpgs lol. While this is a lot more action than it is rpg, it still gives me the same feeling I got when I'd be playing Fire Emblem Path of Radiance and Radiant Dawn. It's great XD
Yeah,
Vyse is a champ and I love how characters from Skies of Arcadia are in Valkyria Chronicles, it's so damn cool

I love it when you move him first out into an area, his potentials will activate and he'll be like "Woah-oh, our hero's in trouble now!!" and then when he shoots people and unloads the entire magazine into their face he's like "HAHAHAHAH!!". It truly is a pleasure whenever he goes on into battle

I have him working together with
Rosie a lot who I love as well cause she's got the big sister potential and strong willed as well. Of course, it's a given that you use the badged characters in the first place since they give you more Command Points. Also, while Jane is good, I've never really found any real use for her potentials since it's more useful to ensure your Shock Troops are better defensively than they are offensively... cause offensively, they're already powerhouses when you equip them with the power based machine guns. That's why it's good to use Vyse and Rosie, cause they'll get defensive stat bonuses.
Vyse, Aika AND Fina are actually in Valkyria Chronicles. Vyse is the Shock Trooper, Aika is a Scout and Fina is the medic...
PS3: SEGA's Valkyria Chronicles SEGA Cameo
And yeah
Jann is great to use too. It's great, he's always like "Ooh, look at my muscles" when he gets tank killer activated, and then he starts singing "I could get looost in these muscles" whenever he's around a bunch of other guys XD It's great lol. I always team up Jann with
Largo. They're a great Lancer team.
Oh, and
Alicia and
Noce make a great team. The scouts themselves are so damn good to use. I like to get Alicia out in the field first and then follow up with Noce, positioning him near Alicia since he's very protective of her. Otherwise, if the mission has Alicia sticking closer to Welkin, I'll have
Freesia or
Aika there instead. There was this one bit in chapter 15 where...
it's the final fight with Selvaria and you have to try to kill her while she has her back turned to you or she'll simply dodge your fire. I got her really easily in that level using Alicia and Noce. Just when you think you have a good shot at Selvaria from behind, she runs off and into this corner looking directly at the team you've massed at their main base... so what I did was, I got Noce, and I moved him... literally sneaking near Selvaria and then straight pass her fast enough not to get too much damage and into an area where she didn't have a firing solution. Doing that made her turn and face Noce and away from the rest of my team. Then I moved Alicia and snuck up riiiiiight behind, I ordered Alicia to neutralise which makes it so that Selvaria can't counter attack when Alicia attacks. Alicia unloaded 5 bullets straight into Selvaria's head and brought her health down to half way exactly. So then Selvaria gets shocked and turns to face Alicia and away from Noce and then I end the move before Selveria can open fire. XD And this is where I have her by the balls... so to speak. Noce is is a great position now, I choose him and sneak him into a firing solution so I can get a clean headshot on Selvaria from a good angle where she won't turn around. XD I did it and got her in the head and defeated her so easily. It was such a great manoeuvre that I had to share it with ya'll.
For the snipers, I like using three actually...
Marina,
Catherine and
Cezary. Marina is by far the best, though she only really shines when she's alone. Catherine is great when you need a sniper close to the others in your team and is also good if she's near an engineer and it's good to have her hiding in grass. Cezary is great in the desert areas. He was really useful in chapter 7 and also for levels with plenty of other snipers.
Out of the Engineers, I use
Claudia and
Nadine... mostly because Claudia is pretty cute and Nadine goes really well with Zaka, and because later on in the game having a Darcsen around activates some potentials in certain people.
Those are my favourites, though I sometimes switch in and out a few other people in the list of 20 depending on the situation.