Too much of a question
Hi all and Feyrun,
That is a very broad question, to be honest if your looking for players opinion on each section you would do better to browse the forum, most of the players here have discussed all the topics your asking about, there are threads covering strategies and techniques and how well and how bad players are doing at SNG, Ring Games, Multi-tables etc.. You can probably find all the help your looking for just browsing this forum and you won't have to wait a couple of days for all the answers to be posted here.
I do find your question a little strange as most players ask on only one type of game but your asking on all types, most players favour only one or two.
Why not tell us some more info and we can maybe help you further, are you new to poker, what stakes do you play, do you favour the SNG's or Ring Games etc...?
Good luck
Tony ( The Webmaster )