Squonk
A major, mostly the bar chord on the 5th fret.
Whenever I pick up my guitar my hand automatically finds the 5th fret. I just cant help myself.
dee
The dominant 7 # 9 chord, a.k.a the Hendrix chord. I see a few other people have already mentioned it... ?
And any other bar/power chord with open strings, as with Eddie Van Halen
NorioDS
I think the E/Em and A/Am is a common problem for guitarists. E (open-position) is probably the easiest 6-string chord to play for a beginner and A, as others have said before, is just so easy to find, we just gravitate there.
I've started battling this and now find myself playing mostly in D and C. But I'm trying to force myself into G# and stuff to break the habit.
I think it also has to do with the dots on the neck. Depending on what key you learn first, transposing to a different key might be difficult in the beginning because of the visual-relations your brain makes with the dots.
Don't worry about it. I think we all do it and I also think we all grow out of it.
Lethe
I'm with Alan here. Really dig add9 and sus2 chords. Progressions where you move the chord but keep one constant note are also among my favs. The chords of course keep changing depending on what you do, but the overall effect is usually quite pleasant. I'm also a fan of 2nd inversions of basic major/minor chords.
Anyways, is anyone keen on putting up a lesson about dimished chords? They sound really cool, but I'm still not too sure of how to use them in composition. I usually use them as a chords with a leading tone to resolve to something, but I'm still not too sure of what the Idea behind them is. Also on how to use them to modulate...
Wessel
Any diminished chord is my favorite. I first started to love this chord when I heard Yngwie play the arpegiated version. Best thing is the next diminshed chord is always just two frets away. Awesome chord for worshipping the dark lord ect.