I only feel like that some 95% of the time. 
For example, I love cartoony styles with a bit of an anime touch that are so expressive, very stylized, have so much energy, playing with shapes a lot, bold linework... and I just can't draw like that. I've tried but it ends up looking the same as my usual stuff. Stylization in general is a big problem for me, it seems like it's so easy to draw in a loose cartoony style, but for me it's extremely difficult. I keep wishing for a simpler style, while being unable to stop over-complicating everything. 
Another one, I love horror art! ...and I really wish I was drawing something more spooky/horror-esque but somehow either I don't get any good ideas, or can't execute the concept the way I wish to.