I'm basically an Asus fanboy. I've been running their motherboards for years, and I have an Asus router now as well.
Also agree about G.Skill. Another good mfg.
This myself, nothing wrong with Corsair RAM, but prefer GSkill personally.
Asus for MOBOs
Noctua for fans and coolers.
Antec for PSU's, depending on who actually makes em, even for most of my cases, but if I rebuild might change down the road.
Even have one small HAF I like in the bedroom for a big HTPC.
Some of the Corsair cases might try out in the future even.
HDD's I like Western Digital, SDD's Samsung.
Last Video card bought was an Asus DCII TOP 280X, I just like certain things over there years I guess and stay along those lines.
Dell and HP I wouldn't buy the computers personally, but have several monitors around.
Logitech for my trackballs, yeah I like trackballs, wish they still made non wireless ones.
And still just use a Microsoft Natural 4000 Ergonomic keyboard for my big fingers just because I like it, and have had several over the years.
Just IMHO.