I come from an "instrumentalist" background and used to play piano for several years before picking up the guitar and playing it for 5 years as well.
I only recently picked up Live (Reason and GarageBand as well) and simply applying music theory and "programming" music without the need of any actual playing skills really quickly started to feel like cheating. Even though I play piano, I don't even use a MIDI keyboard when making music with Live. I program it and alter it afterwards to make it feel more natural with results that usually sound better than my imperfect playing...
Not only this but you can watch your music slowly come to life, you become a one man band, hell even a whole orchestra if you want to. You can produce basically any sound you can think of and even sounds you would never have though of. You correct every little mistake, iron out anything that doesn't sound perfect in a few clicks until your whole work sounds just like you wanted. Then you also produce your whole song, mixing it and mastering it until it sounds like a professional record (if you got the skills).
As a guitarist who spent years playing the same scales, chords and 3 chord songs over and over and over again until they finally sounded somewhat acceptable, I really feel like using a DAW is like cheating to the point where it totally kills my motivation to keep playing guitar.
I understand that traditional instruments supposedly bring more realism and "feel", but unless you're Eric Clapton or Maurizio Pollini, you probably end-up bringing more subtle mistakes than desirable "feel" into your music and the whole thing is certainly not worth years of rigorous musical training. With advanced programming techniques, multi-sampled instrument libraries and modern DAWs, you can get pretty close without even knowing how to play an instrument. Besides, if you treat synths as instruments in their own right and don't strive only to emulate real instruments, that whole point is moot anyway.
I have come to a point in my life where I really wonder if I should keep playing guitar. I'm 25 years old. I don't have a band. I never saw the guitar as a way to get into girl's pants playing Wonderwall on the beach (and I even do less so)
I still enjoy playing guitar but I also enjoy composing it in Reason. The only reason I still play is to maintain my level but frankly it feels like I'm bringing a knife to a gunfight when I think about what I could be doing with Reason while noodling around on my guitar. I'm really considering dropping the whole thing and focusing on making music with my computer.
Have any of you started as instrumentalists and discovered Live/DAWs afterwards and felt the same thing? I can't possibly be the only one.