Re: playing in general
It isnt bad per se, but it doesnt contribute to your abilities... It actually slowly adds a crutch.. You get so used to playing that way that you may experience severe dificulties later in life should you decide to try a different style...
I too had bad habits that I was forced to break when I started my post-secondary educational studies. My instructors would hound me about many things, then I noticed my playing was more fluid... At that point, I quit griping and listend to what they said...After all, I was paying them to teach me... We as humans, are resitant to change. Once we develop a method, we will fight til death defending it, instead of realizing that we might actually be better off listenting to those with experience and preventing future complications...
One instance in particular I can cite that will give you troubles is when playing on different areas of the strings... For different timbre, you can move you area of attack towards the neck of the guitar, or closer to the bridge... This is especially useful when playing solos... If you are used to anchoring your pinky, where will you anchor when you move closer to the neck... And even if you do anchor it, isnt that just wasted motion?
To keep you from feeling as though I am attacking you, I will give you my instance... I had a habit of economy picking, instead of alternate picking... There are instances where the shortest distance is to pick down twice, instead of up once and down once... My instructors used to nag the crap outta me, and I would lose points during the performances based on that... So, I conceded and began to practice the alternate picking... It is slightly harder than economy because of the extra motion... However, if you can learn the hardest methods that contribute to your playing abilities, then the easier stuff is, well, easier...
Try to learn to play with the strictest form possible... There are too many obstacles to overcome without having to contribute to them.
Hope this provides and alternate point of view,
Allen