Its all abt ur interest and ability to learn.. Im MCTS in SQL server dev. But never worked on that.. I have done most of the .NET (basics only) and worked in ASP.NET + SQL for 1 yr. Finally i m working in java for past 1 yr. 

What I mean to say is that technology is very vast and ur interest keeps on changing.. And of course more time == more knowlwdge.
Decide based on ur potential.