It's interesting to see how many people really don't like changes and simply want incremental tweaks to stuff we already have. Perhaps it explains why MS and Apple are always hesitant to make major/new UI changes for an OS for risk of upsetting customers, which I guess is why in 2012 the OS still looks fundamentally the same as in 1995...
I've been using 8 daily on a laptop and gaming PC for months now and really like it having taken the time to customise things to how I want them, even little things like zoom out on the start screen, group your program's how you want them and name the groups. Pin websites and people from the people app out onto the start screen to get live updates etc.
Actually what we could do with is a fresh "So you have Windows, share your tricks, tips and customisation" thread, but I digress.
My observation would be if you want to make windows 8 into 7, don't... Seriously, it's pointless and is doomed to problems sooner or later. I you love win7 and don't like the changes Win8 has brought (and I'm 100% confident there will never be an "official" remove metro option) then really, stick with 7. It's an awesome OS, stop tring to make 8 into something's it's not.
If you're prepared to go with 8 then my advice is do it with an open mind, embrace the new start screen and all the changes, try to work with them rather than against them, accept things are different, take time to learn the changes , make the most of it and regard it as an opportunity to learn/do something new.
If you put 8 on and insist on trying to make it work like 7, or want to carry on doing things the same way it's just going to be frustrating and coUnter intuitive. If you want to give it a go do it properly
8 won't be for everyone, and doesn't have to be, 7 has years of life left in it and works brilliantly.
Finally I would say if you try 8 try to ignore the bandwagon "it's 7 with a touch UI stuck on, it's fine for tablets but doesn't work with a desktop mouse and keyboard, and for the love of god don't install the appalling "start" thing (if you're going to do that just stick with 7 and save yourself a lot time and hassle).
Change isn't for everyone straight away, we saw all the same stuff 10 years ago when XP came out. People ranted it looked like fisher price graphics for kids, was bloated awful piece of software, changed they way they did things and they hated it. People would call anyone using the Luna UI in XP "noobs", "pros" would always enable classic UI mode to make XP look like win 98/2000. Ironically there was the same thing with Vista and even 7 with "pros & pro gamers" clinging to XP
Bottom line for me, it doesn't cost much if you take one of the offers, if you're going to do it, take the time to do it with and open mind, accept it's different and you'll have to learn how to do stuff again and spend time customising it to your own tastes. If you're just going to try and turn it into Win7.5 you're probably better off just sticking with 7 unless you're an uber geek
Hope that doesn't sound argumentative, it's just my observation that most of the frustration seems to be people expecting, or trying to make 8 work like 7, which is never going to be a good experience.