When this game came out, i was wondering who would be the most played online character, My first thought was Ken because of how popular he was in vanilla and it would carry over to this game.
 I was right, then I was not right.
 
I fought a blend of characters, mostly new characters. My first was a dudley(Free win), Then my second fight was Juri. After all of the recent online matches i've played, i'd have to say Juri is so far the most online played character in SSFIV, Im not sure if its just me or not. The majority of Juri's just spam Dive kicks with their u2. Usually they would hit their EX dive kicks but yet miss the ultra combo because they are doing it too early.
 
The second most fought was my guess, Ken.  Flowchart kens were back. Not much as the juri's but they were still there and still existed. They did the same thing as they did in vanilla.
 
Lets talk about Ranked and Other endless battles shall we?
 
Ranked battle: Really nothing to fancy, I saw a few players host a 1 round 30 seconds match.
 
Endless Battle:I don't really like it that much. Most people Host 8 players and there is one player who dominates everyone else and it takes awhile before its your turn again. When i play endless I usually look for a 3 man lobby or less.
 
Team Battle: Great idea to be honest, I had a few matches were people sounded like they were having a great time over their microphones and helping eachother out. I recall when a vega was on my team another teamate was helping him. The only thing I don't like about team battle is that too much people play with their friends versus randoms. To me its rare to find a game were there isn't two people on the team who arent friends. The only time i ever host one of these matches is when its not an all-random lobby.
 
Replay system:I really haven't found much use for this yet, I still use the "New Replays" option in it. I don't go to the certain channels to see a random match of two people. Lets say I want to find a Ryu match. I would go to the "new replays" option instead of the "Original characters" channel. 
 
 
 Edit:I wish there was a way to search an endless lobby were you could search how many players were in the lobby, not just by how much rounds and time
 
What are your thoughts on the online system now?

Ranked Battle is a bit of a mess for me so far.   
 

1. "Same Skill" flatly does not work.  I'm at around 600pp, and fight people 4 and 5 times that level on a regular basis, not to mention some who were in the 3,000bp area
2. The same dumb connection logic persists from the first one, ending up in a fair bit of "could not join, search again?".  If it can go out and find me matches to successfully connect to while matchmaking during Arcade, how does it have so much trouble in regular Ranked?
3. If Ranked is supposed to be a match of people of like skill (and if "Same Skill" actually did something) why would Quick Battle not have Same Skill as default?