if you're looking for atmosphere then its a very difficult question,apart from Stretty tier 2 it will depend on who you are near on the day,on days like tomorrow some decent lads might be in K but there could be an equal chance of you standing near a family who won't make any noise. Really some areas in north could be better than K if more lads are in North for the odd game,its just the way it goes. Stretty tier 2 is seen as the main standing block and therefore those going there know they have very little chance of stewards forcing others to sit down,as the stand is not shown on TV there is no evidence to suggest the stewards aren't doing their job.
For a stand with view,North tier 2 gives you a good birds eye view whereas south and north tier 1 will have you within spitting distance of the players,whether you spit is up to you
but sadly as this is where you're closer to the players expect plenty of cameras from people finishing their collages