It’s really cool to see the variation in which pets people use, not just one or two “cookie cutter” combinations.
Personally, when I’m Beastmaster traited, I love going with the Jaguar as my primary pet. It’s hillarious in WvWvW – stay at range, wait for someone to stray from the pack/zerg, and send your stealthed pet at him. With Quickening Zephyr + Rapid fire support, people are on the ground quicker than they can react. My secondary pet varies, but I tend to favour the Lynx for pure DPS (it also fits my Norn character).
In PVE group situations, I tend to use the Red Moa for the buff and heal, or a combination of bears for survivability/tankiness.
It’s weird though, inspite of the wonky pet AI, I find myself finally enjoying pets in this game. In other RPG’s I’ve always liked the aesthetics of a Ranger, but I’ve looked for a “lone wolf” mode. Right now, I’m actually basing my entire build on the little buggers.