AIM Mail and iCloud mail are more reliable than GMail. I had to set my GMail account to permanent forwarding two years ago because it chokes if I am getting mail on more than 2 computers.
In what universe is iCloud Mail more reliable? iCloud is a complete joke, the 'Me Mail' has been riddled with outages and flaws due to apple not actually using a cloud at all (no, iCloud is NOT a cloud platform).
Gmail has been proven to be the most reliable across the globe. Its highly stable and has been adopted by a large number of ISP's (in the UK, the largest ISP even adopted it, and its worked perfectly).
The YouTube ads are unbelievably intrusive now that they block the content itself. I don't use video sharing much, but I prefer Vimeo.
I assume you are aware that its down to the channel owner to decide if obtrusive ads are displayed...
I have no issues with Chrome, but it doesn't offer anything that makes me want to use it over Safari or Firefox.
Chrome has the best support for Webstandards, closely trailed by Safari.
Chrome has a huge addon/extension base, Safari's is pitiful.
Chrome has in the space of about 3 years, gone from nothing to having a greater marketshare than Firefox. Safari's great, but its effectively just Chrome with less features.