Do I need to uses always the last targetSdkVersion?

Question

Simple question: In Eclipse \"New Android project\" command always tries to uses last available sdk. Is it always a good idea?

UPDATE:

I try

Answer 1

What could I do very wrong with this choice?

There is nothing wrong with this choice, which is why the build tools default to it.

Setting the targetSdkVersion opts you into specific behaviors that you might not get with an older targetSdkVersion. You can see some of what you get by reading the documentation for Build.VERSION_CODES.