The major downside to Bray is that he's a complex character in a promotion that only cultivates simple ones. It feels like he's from a different universe altogether, and as such, they often have no idea what to do with him. Most of his feuds have been "attack guy, speak in riddles, lose to guy". They should have turned him face a year ago.
People have been calling for Roman to go heel for ages now. It may be happening soon since his rumored Wrestlemania match is with Undertaker. And he WILL get booed against Taker. As far as who's good in WWE, this is probably the best they've had in terms of pure talent. Here's a few. AJ Styles (Best guy in the company. Almost 40 and still having great matches. Just lost the Smackdown World Title. ) Kevin Owens (RAW world champ. Fat guy that can move. Great promo guy.) Cesaro (Big dude they don't do nearly enough with. Has good matches with everyone. Kind of a Swiss James Bond.) Bray Wyatt (If he debuted 20 years ago, he'd be killing it in ECW. Does a backwoods cult-leader thing.) Others: Sami Zayn, Seth Rollins, Neville, American Alpha, Samoa Joe, Shinsuke Nakamura As for a show to watch, it depends. You should be eligable for a free month of the Network to check out the stuff they have on there. For WWE stuff, I'd say either NXT or Smackdown. Both are short and easy viewing. RAW is fucking terrible most weeks and it's three hours long. Lucha Underground started off really strong but has really fallen off a cliff lately. They're obsessed with man-on-woman violence and the storylines aren't nearly as interesting as they were in the first two seasons. Those would be worth checking out, though.
He came in as part of a hot group known as the Shield, flanked by two much better guys to mostly hide the fact that he wasn't very good. He got better, but by the time the company decided to make him the new Hulk Hogan, the fans had already decided that was going to be someone else (plucky underdog Daniel Bryan). They responded by shoving Roman Reigns down everyone's throats (including having him beat Bryan), which just enhanced the idea of him being an undeserving guy in a top position because Vince McMahon thinks he looks good. It's been years and years of them trying to make him into this big thing and he's just flopped over and over. Doesn't matter, they keep trying. He still wins all of the time and comes off as an unlikable prick pretty much every time he speaks. Him appearing in this years Rumble was a huge troll because he basically made the last two years unwatchable.