Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Are you still around here? If you are, we are paired for round one of BW2 ladder tour playoffs. My timezone is GMT+2, any specific time or day when you want to play?
Given the deadline, saturday is what is best I think. Wednesday right after you get home would also work, but that cuts the deadline extremely close and I would hate to do that to ya.
As for the tier itself...Hyper-offense [something like pdon + geo xern + sd arc + darkrai], and full stall [pdon / bliss / msab / lugia type teams] have been some of the most successful strategies. A few balance teams have succeeded in the meta also [lord outrage balance]. But yea, the metagame is dominated by the top tier stuff such as geo xerneas, primal groudon, darkrai / m-gar, and arceus so there's limited room for creativity in the meta, you'll be playing & and using a lot of the same stuff in the tier, but it can still be fun, the better players knows how to switch around / out-maneuver their opponent or use a specific set that counter styles the opposing team.
Anyway, I think that about wraps my thoughts on the meta, sorry [again] for the tl;dr xD, hope I helped.