Are you using photoshop to create these?
The one thing I like about using photoshop filters is that you can create some really amazing effects with photographs. In your second photo, I like that the use of a pencil filter creates a softer feel with the gray tones, and cropping the photo does a world of good. I think it'll really pop with the adjustments of brightness/contrast before applying the filter.
In the third photo, again, I'd try adjusting hue and saturation of colors before trying the sketch or comic filter(or is it heavy outlines?) because you're almost losing the veil from the image completely. Sorry if I'm sounding overly critical, I'm not trying to be I promise! I think you can make some really cool wall art by adjusting images in this way