Comment by Iknown0thing

Most of them are related to how and when your stocks are vested. Most companies never IPO and get to a point where you can sell your stocks on secondary markets. So vesting period and terms of it are important. For example - if you dont have accelerated vesting, you end up getting nothing when the company is acquired even at a good valuation. Depends on terms of acquisition as well and what happens to employee stock pool when acquisition happens.