EPTHowever, beeing thrown out of consistent playing anyways, I think it's a nice timing to switch races once more.
During beta I played Terran (Platinum/Diamond), then, after a long time of activity after SC2 release, I switched to Protoss (Diamond->Master). Now I'm thinking about switching to Zerg again.
Reasons: Protoss often feels very, very static. Against Terran it is dangerous to leave the base at all when there it is no commited push, as stim infantry will definitly catch and destroy a too small army. Against Zerg it feels like it is pretty much the same at certain points, even though more movement is possible after a certain time.
Also Protoss feels like it has a certain macro cap, that does not totally exclude further improvement, but basically says "from here on you should work on tactics, tactics, tactics".
It feels a lot more fun to be Zerg to be honest. It's easier to force spread out games instead of "one push and that's it"-games, it's easier to be active on the map and I feel less constraint in general.
One thing I noticed quite soon: Playing Zerg "feels" like requiring more skill, but actually does not. But all of the sudden I can reproduce that feeling so many Zergs have when saying "P/T is so easy, you have forcefields, you have (insert lot of stuff here), your pushs are so strong, and my macro is so hard.".
Playing with a much less defendable base and relying more on units as well as having to spend more attention on macro definitly shifts the game a lot, but I feel like Zerg benefits a lot more from good intuition and relies way less on good strategy. This way I overall feel like it is not really more difficult, just different.
It's kind of weird, but even though Zerg usually is the race that often gives up on initiative and just has to expect what the enemy does, it seems actually to be the race setting the pace.
It always has the choice between attack, harass, counterattack or expand further and what else might be possible, while playing P or T always felt like "now exactly this is my gameplan and this must be my next step and only when something exeptional happens I can derivate.".
P/T's paths are somewhat like on rails. Building a production facility means to set a direction for the rails I'll be on for the upcoming time. Zerg is like an ATV in comparison, always free to chose any direction once a single building is there. I think many Zergs tend to underestimate how limited these races can sometimes be.
