My vote is for a balanced or semi-stall team (of any weather/field-effect) built around a creative/under-used stall-breaker.
Lavos' Rain team is a good example of this - it's a well-built balanced team with a spinner, solid defensive core, and offensive plan that introduced a new stall-breaker to scene, Work Up Vaporeon.
I personally feel we should stay away from hyper-offensive teams, because they are incredibly easy to build due to all of the powerful threats and moves this gen. Coming up with a complete balanced/semi-stall will help educate team-builders on all aspects of the meta-game (like the entry hazard war, weather war, wall-breaking, and tanking), not just setting up rocks/screens and attacking like HO teams.
Here are some examples of stall-breakers that we as a community can potentially build a team around:
Rain
- New Mixed Salamence (with Roost + Hydro Pump > Brick Break + Fire Blast)
Sun
- Sub Charge Cresselia
[*]Quiver Dance Lilligant (with Sunny Day + Leaf Guard)
Sand
- Alexwolf's Taunt Aerodactyl
Hail
- Bubbly's Sub Disable Froslass
Gravity