For some of us, 30's is the new 20's because we spend so much of
our youth and 20's pursuing those paper qualifications and then
embarking on the rat race, trying to establish ourselves in our
chosen career paths, that time just whizzes by. 
By the time we 'settle' down a little and get a relatively stable
job, we find ourselves in our mid to late 20's.
And if the relationship that you invested a lot of your time in
somehow didn't end in matrimonial bliss, you'll find yourself
suddenly single again, and in your 30's.
And if you're super suay, you'll have parents and relatives
clucking around you like panicky headless mother hens in a frenzy,
getting all worried about you STILL being single!
That's when you start to develop
your own unique and cunning or even, vicious ways of
counter-attacking them!

In the 20's, you're mostly still finding your footing in life. In
your 30's, you'll find yourself with a newfound self-confidence (I
hope!!) and you'll more or less have established the foundations
for how the rest of your life might turn out. 
Hmm... I think I'm going to have a pretty happy rest of my life by
the looks of it! 
What can I say... It rocks to be in your 30's! 