does the Asari need to go into statis?

I'd imagine the reason the Asari had to be frozen is because there were limited resources aboard their Ark and the Nexus. Sure they can live for much longer than 600 years, but they still need to eat and I doubt their Ark or the Nexus had enough food stores to last them 600 years. If they're frozen, they don't have to worry about going through their food stores until after they wake up.

Why did humans start the Initiative? I don't know, probably because a human was just the first one to really consider the idea of traveling to a new galaxy.

As for the Nexus, are you asking how they built it after coming to Andromeda? Because they didn't, not really. The Nexus, or at least part of it, was already built before they left the Milky Way and it then traveled to Andromeda. The plan was to finish what was left when they arrived in Andromeda with the help of the other Arks.

They were forced into stasis. Who wants to wake up to an entire ark of grumpy old Asari Matriarch (about 800 years old)

The asari went into stasis to avoid consuming food and oxygen, and to not be bored out of their minds.

Everything else you said have some very good points.

Silly question. Here's another... How would you like to spend the next 60 years of your life stuck on an aeroplane? Book now and we'll upgrade you to platinum deluxe sucker class. Any takers?

Besides, there is only so much Netflix/Hulu you can watch before you can't take it anymore.

You do realise they would have wasted over half their lives just getting to Andromeda right? So it makes sense that they were in stasis to

Yea, tell a girl to age 600 years while the rest have a refreshing nap. Trouble brewing. You have much to learn about women.

"The day the terribly beautiful ladies with black eyes came to our galaxy. On ships full of braindead husks that got their brains sucked out."