Like dinow said do what ever you feel comfy with and it'll turn out better that way

Do shading that you feel like doing \o/ and match it with what look you want for a skin. Keep doing new things, trying other techniques, changing things up every once in a while. Sticking to the same thing never helps you improve or learn new things. Kaos_Kitten​ said it right. 😉

I would never recommend just sticking to one style, I not only switch my shading techniques but also my eye styles too.

I personally feel that certain designed need more complex/simple shading, so sometimes it's best to go with the design rather than a personal style.

Just don't force yourself to do something you're not comfortable with and ultimately never give up! You anything us better than nothing.