I love everything about your masterfully constructed team.
Was this really just a first go at a 5th Gen team? Just like that?
Wow.

Bronzong @ Leftovers
Relaxed
252 HP / 184 DEF / 72 SDEF
Levitate
*Gyro Ball
*Earthquake/Rest
*Stealth Rock
*Hypnosis/Toxic
The only thing that I can think of recommending is..
Bronzong @ Leftovers
Relaxed
252 HP / 204 Defense / 52 Attack
Levitate
-Gyro Ball
-Earthquake
-Rest
-Sleep Talk
It's totally understandable to keep Bronzong exactly the way you have it, simply because it's awesome. It compliments your team very well and it's just great with SR and Hypnosis / Toxic. The only reason I'm making this suggestion is because I was recommended a similar set and I had great fun with it.
my first RMT for the Fifth Generation I believe. I figured it would be a good time to post one in our new forum: The Competitive Battling Center! This team has been really, really fun to use. As usual with most of my teams, it's not perfect. But I don't care about constantly winning. I've come to a point in my Pokemon playing "career" that I don't get upset over losses anymore. As long as I have fun (and yes, this includes matches with lots of hax. They can still be fun). But I still prefer to win obviously. This doesn't really have a set playing style. I guess it's kind of offensive with a few defensive pivots to play off of. I rely on resistances and immunities a lot.
I really, really admire this.
I wanted to get into competitive battling because
I wanted to win and that makes losing
very difficult. Hearing your feelings towards competitive battling is extremely inspiring, because ultimately, we all want to have fun with it. As a new battler, I am very impacted by this. It must make every battle so rewarding. I hope I can share these feelings about battling someday.
...Though I probably need a little more experience first. ;P
I'm sure you've given a lot of young battlers a lot of inspiration. But hey, who doesn't like to win?
That's all I wanted to say.
Sorry I got all sappy there.
Awesome team and good luck!