I can knit either way. I find Continental to be easier when the pattern calls for alternating knits and purls, like ribbing or seed stitch because flicking the yarn forward and back is so easy with the left hand.
I find English to be easier when the pattern calls for many decreases (like lace) or twisted stitches, because these stitches tend to be tighter and getting the working yarn back through them is easier if I'm tugging on it from the right.
I use both when knitting Fair Isle or stranded patterns, with one color yarn in each hand. I have to be careful, though, because my Continental gauge is looser than my English.