Gmail - first impressions

Google in their infinite and growing wisdom created a Gmail account for me a couple of days back.  I know I'm not the first to try Gmail by any means but I was curious to give it a go.

My initial impression is that it is clutter free - a welcome advantage over my Hotmail account.  It consequently opened up much faster.

I sent an email to myself (how sad is that?) all about AdSense - and was impressed to see ads all about AdSense and AdWords in the margins.  So it looks to me as though the AdSense technology they are using works.

If I send an email to myself about manufacturing nuclear weapons, what ads will I see then?

One minor prob. at this stage - I tried to upload a file of around 800k as an attachment (I was sneekily trying to use my account as a free backup)  The system gave up after around 300k and just said there was an unspecified problem. Clearly data volume was not the issue given that each Gmail account comes with 1 gig of space.

Will I become an avid Gmail user?  Probably.  Hotmail drives me mad and I am getting ludicrous amounts of obscene spam in it even though I have never given my address to anyone I don't trust. 

The lesson here is to use a long account name so that computers that just spit out emails to all permutations and combinations of the alphabet are unlikely to guess your valid address.