Hotmail vs. Gmail

I have a BIG dilemma.  This week, I received my second email of the month saying that I had won something and not returned the sender's email within the allotted time.  The first person said they blamed their yahoo mail, but by the second time, I started thinking it might be my hotmail.  So now I am thinking I should start switching everything over to gmail....

My accounts are fairly linked already.  Because my gmail is currently my secondary account, I have my gmail coming into my hotmail account.  I know the option exists to flip that though.

Have any of you bloggers out there ever switched email addresses?  Did you resubscribe to everything at once or did you do it gradually?  I am an email subscriber of a ton of blogs and the thought of switching them all at once is beyond overwhelming!

I need advice...help!!!!