I believe most lists of controllers I've seen goes Cherry SG > Black SG > Wii/360 LP > WT > Xplorer > PS3 LP > RB Stratocaster > PS2 Kramer.
A lot of people say exactly that. The biggest problems with the SGs are the frets are spread farther apart then the other controllers, and the frets are more difficult to slide.
My personal favorite guitar would be the X-Plorer. I would rank it number one if the darn thing could not break so many different ways. Examples: wrapping the USB cord around the guitar (mainly to save space) breaks the wire and you have to buy a new one from a third party site like guitarheroparts.com, the strum bar can be so abused that it starts to over strum for no reason (only way I found to fix it: strum like a madman), and the biggest complaint ever is the whammy bar breaks because of the cheap plastic (can be fixed by replacing it with a metal part from guitarheroparts.com or the cheapo way with wrapping a rubber band around it).
Then there is the Les Paul, a really fantastic guitar. Easily my number two if it did not have unresponsive buttons due to the removable neck. Also, I have been using it a lot lately since my X-Plorer broke so it is a slowly dying problem for me, but the whole feeling of the guitar is incredible tiny.
Reasons being many and varied, for instance, you can strum much faster on the GH guitars, and the buttons have better tactile feedback.
I believe Harmonix figured they would never need a strum bar to strum as fast as Lou's intro wank to The Devil Went Down To Georgia. However, I should take that back because Green Grass High Tides has a short phase were you need to strum that fast for two seconds. The great thing about the strum bar on the Fender models is that it is more bass-friendly. It is built that you can alternate pluck or slap without the the strummer slapping back hard like it does on the Les Paul, X-Plorer, and SG.
As for the buttons, you really just need to get used to whatever you play. When I first went from the X-Plorer to the Les Paul I felt so obscure moving along the neck. Then when I tried the Fender my fingers slid so well that I would hurt my finger on the plastic part that sticks up under the orange fret. Depending on what you play, it become gradually easier to play it.
It's not annoying at all, and is never louder than the music
No, you realize the difference. Trust me.
Without it, alt-strumming on Strats is horrible because you have no idea how fast you're going. Also, if you play well, it will be in time to the music, and so doesn't distract from it at ALL.
People have such a problem counting. I did too when I started playing real guitar. I am not saying to should count every single thing you play, you just need to get the main jest of the song. You will eventually stop looking at what you play because you get in the groove so well. This evolves into being able to talk with more thought while playing (only really needed to if you are playing multi-player or someone else is in the room with you), and, a big plus, singing and playing at the same time. However, this varies during solos. The Guitar Hero strummer does not distract you because you become depended on it and you start to morally block it out yet still use it to your advantage. (Do not ask me how, I am still figuring it out myself).
Things GH4 does have though, include Hendrix, Lynyrd Skynyrd, and all the songs haven't been used in a past game (RB2 has some repeats.)
I know you do not want to count the DLC, but there are a few Lynyrd Skynyrd tracks on it. Harmonix repeats some of their past used songs for a.) some people want to sing or play drums on those great songs, b.) they were covers, but now they are master recordings, and c.) they were under-charted on guitar and bass, now they are better.
Almost the entirety of GH1 and 2 were undercharted
The games were not a big cult following it those days. They tried to keep it as simple as possible while still adding the random hard parts (fillers, added outros, ect) to prevent easy 100%s. Guitar Hero 1 was extremely under-charted, but I will not deny that the songs were fun to play.
The irony of the people bitching and complaining about Neversoft overcharting songs is that the ones that get accused of it most often (eg, One, Raining Blood, TTFAF) are actually severely undercharted to make them possible.
Are you kidding me? TTFAF was over-charted! You play keyboard measures for goodness sake.
The instruments aren't going to be cross compatible.
The only reason that the instruments are cross compatible on the Xbox 360 is because Microsoft demanded it. Microsoft wants its customers to be happy with convenience in their attempt to take over the gaming world.. (lol)
None.