I didn't like LGs because they were not very user friendly. I admitt they seem to have progressed a lot in that department. I tend to think philips are rebranded LGs.
I do not like sony for their money ripping methods and the fact they are compatible with nothing outside their brand and/or media limitations.
Also, they did in the past steal their faithful customers from one gen to the other by lowering the quality a lot in the same range/price of products.
Samsung, well mostly price, tend to try and steal their customers with screen quality varying over time in for the same part number... especially when it's an awarded product...

Pioneer were good to very good, only thing is those guys never thought a noob user interface would be useful and of course keeping the advanced user one. What I mean is that you paid big bucks, you had magnificent plasmas, but then you had to scratch your head to fine tune them... I'm pretty sure their user interface is the main reason for the downfall, price isn't a problem when quality is easily perceived as high above the rest... Thing is, it was the case only after suffering the user interface nightmare.

Sharp had great sets in 2009 and 10. I do not really know now, I guess their 4th color gimmick was a really bad marketing idea, although increasing the brightness through yellow pixel wasn't that bad an idea, their promotion angle was clearly bullshit even to most non tech customers.

Should I buy a screen today?
Probably a 60PK950 for the bedroom, I have a space that I can't really benefit from in my bedroom, I have a nice distance from the bed, so that would really fit well.
For the living room, my current 42" panasonic will be fine, nice TV. Yeah panasonic is fine, only their pricing is probably not totally related to the quality difference they have from competition. Also their media compatibility isn't good.

Oh, and for the living room, I need to reinstall my projector and so on. Only I need to think of artifacts for the install to be WAF compatible...

Other brands? Well, I admitt I can't really think of something.
LG Samsung, Panasonic and Sharp all manufacture their own screens, many other brands only rebrand subs parts from those and sometimes add a premium price (B&O, Loewe for example)