What DO or what SHOULD I mine?
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but what would be a wise choice? using THAT pool and end up mining a little of EVERYTHING or sticking with one coin and which?
That is indeed the game we are playing. You'll get a different answer to that question from everyone that answers it, and a good portion of those answers will likely fall into the category of dis-information. Everyone has a bias of some sort and some can't help but to try and steer readers in a direction that profits themselves more than the readers.

The most profitable advice given to me was to try everything (pool, solo, pick one coin, try lots of coins) and see what works best for you. Everyone has different resources to invest, costs to maintain, and expectations for the results, and differing amounts of patience. The best advice I have been given is to do the research on the different coins and only support the ones in which you truly believe.
hmm...THAT is a VERY GOOD point.
I have tried calculating every coin I find based on the hashrate (about 360Khash/s) and it is quite hard to get a good answer due to the sudden fluctuation in the rates and difficulties...
It seems that it is always a fight between Mincoin, Cosmoscoin, Digitalcoin, and feather...
I hope to make a decision soon...(I have 8 bat files on my desktop just for different coins, wallets, pools, solo...it a cluster -)
Use middlecoin and avoid the headache of having to set up your own system to switch coins every few minutes. You should be using a pool that automatically switches to the most profitable coin unless you have a hunch that some coin is going to dramatically increase in price.