I find as long as you get a tablet with a 1ghz + processor running ICS or higher, you'll be satisfied. I do have an older Galaxy Tab Plus (7") running Gingerbread, but it works fine for most of the things I do. That is watch video, read e-books, browse web, e-mail, Twitter and Skype. I do a lot of video conferencing with family. It's just so nice and easy having a 7" handheld, especially one with a rear facing camera so I can switch views and show people what I'm looking at.
Last year my bro and I were on a kick to try tablets. We both had iPads and wanted to expand our horizons. He got the HP Touchpad and a crappy Coby. I picked up the Transformer 1 (TF101) and Galaxy Tab 2 (7" Plus). I passed on the Xoom because it was just too clunky for me and the 10" Galaxy offered the same hardware limitations as my iPad (no microSD slot, proprietary plug, expensive price).
This year I upgraded. My Transformer went to my nephew who is in love with it. I picked up the Transformer Pad and Nexus 7. I highly recommend both (including the Transformer Pad or more expensive Infinity). All made by Asus who has a good track record with OS updates. Other one that interests me is the Galaxy Note 10.1 with it's combo Wacom/capacitive screen. I decided if I was going to enter the tablet market, I wanted things that offered a bonus to the iPad I already owned. Apple has invested their future in the app market but Android gives us more innovative tablet features. This year's 7" Galaxy Tab is not bad. They dropped the price to the $200 range and dropped the memory but you still have the microSD slot and dual cameras.
And of course, now that I've experienced a world of Swype, Live Wallpapers and Home Page Widgets, I just can't fathom being stuck in an iOS world.
Main question I tell everyone to answer is what do they want to do with their tablet. If you want it as a netbook replacement for typing, drawing, more data creation, then go for a 10" tablet. If you want it mainly to consume data in bed, the couch, bathroom, then go for a 7". You can do both on either device; it's just more comfortable to create data on a larger device. Just as it is easier to lug around a pocketbook-sized 7" tab.
Once I got my 7" Galaxy Tab last Autumn, I stopped carrying my iPad around completely. It makes a lovely nightstand clock now.