I'm leaning towards Dudley as one of my new favorite characters, though Hugo will always be my favorite in 3S.
Since I only have a short amount of time, here are the basics on
Hugo
MP is your best friend in the world. It has such a great range and is generally a safe poke. Mix it up with your other best friend:
c.MK Like MP it's deceptive in its range, you can nail people with this for the trip from a good distance away, learn its range and use it well. Now one of my most favorite things to do after landing the c.MK is to buffer a 360+K after it. This requires learning the ranges for where your trip was, but basically the FK version will work 90% of the time. Essentially you will trip them with the c.MK, buffer the 360 and then time the K so you can have the move be over there and grabbing them as soon as they wake up. People seem to fall for this one pretty consistantly, I'll be able to pull it off 3-4 times in a match even if the other person has played me a good bit before and it'll still work out most of the time.
Also for c.MK remember that the hand slap (QCB+P) will combo into c.MK, and if the hand slap doesn't hit? Go for the c.MK anyway. Most of the time they'll still be blocking high and you'll get the trip and have the opportunity to nail the 360+K command grab mentioned above.
Learn to standing 360, it's a lot easier in 3S than in other games. Heck technically a standing 720 is possible, though I can't do it yet myself.

The standing 360 works wonders and the reaction of people after seeing Hugo walk up and nail the 360+P with its somewhat generous range is awesome.
Tick into the Gigas:
Use the MP+MK universal overhead, buffer the 720 and then...wait a second, and then hit punch. You need to give it a slight bit of lag time between the 720 and P for the Gigas to connect. This varies on your range and whether they blocked or were hit by the overhead.
Learn to Gigas after being hit. Being hit by a long Hurrican kick chain? Buffer your 720 and Gigas as soon as the move is over. Great against Shotos and Sean.
Shoot Down Backbreaker (DP+K):
Use the LK version 90% of the time unless they're jumping away, then use the FK version. The LK version will catch most people out of the air. The shoto's have a kick that can beat it out, but you will catch the twins out of their dive kicks so it's great to break down jump happy Yun's. And lets face it, watching a Yun player used to abusing the dive kick to combo into his SA3 chain try and adapt when you take the dive kick away from him is so very satisfying.
Also don't forget the HCB+K into Shoot Down Backbreaker. This is critical if you want to use SA2 (Megaton Press). I don't use this too much since most cases that you'd want to use this you're going to go for the 360+P anyway, though if you're in a situation where you can't get the standing 360 off or you want something gauranteed, use this combo.
And with most characters after you do the shootdown backbreaker, taunt. Most characters can't retaliate in time to stop the taunt so it should be safe. In fact the only one I can think of off hand is Alex's EX Dash, maybe Urien's EX Dash as well may hit though few people seem to take advantage of this and let you get the taunt off. The Taunt increases Hugo's defense which is already great, you can do that taunt 3 times. If you U+Taunt it brings out poison and supposedly ups your throw damage.
Overheads:
Standing FP (close) is an overhead, get close on wake up and surprize them.
c.FK (ass-o-doom!) is an overhead you can initiate from far away. Great to do if you've nailed then with two c.MK's for consecuritive trips and they block low, only to get assed with an overhead.
You need to constantly keep them guessing on wake up. High, low games are good, jump-ins with 360s or the Gigas.
Super Arts:
Gigas. For me it's all about the Gigas. Get them under 50% life and nail this sucker and watch them cry. Learn to do it jumping, learn to do it dashing, learn to do it while blocking, learn to do it after a parry. My most favorite thing with Hugo is baiting a Chunners SA2, blocking the first two strings, and then parrying the last hit and nailing the Gigas. I've had so many Chun scrubs drop on me from this, yet somehow it's so very satisfying.
I think if you want to get down to it Hugo's best super is SA3, the Hammer Mountain. It's the only one you can really combo into and it gives you the most options. I still use the Gigas though, mainly because I'm playing for fun and
I <3 teh Gigas!
Moonsault Press is also probably a better bet than the Gigas for gauranteed damage in a match, all you need is one careless jump in and they're eating a lot of damage. You can also combo it off of the HCB+K wall throw as mentioned above.
That's all I've got for now, if I've got time later I can give what I know on a few characters. I definitely want to go back and forth with some of the stuff mentioned for Elena (SA2 4EVA!!!!)