I try to leave positive recs because if I do caveats for one story I feel like I have to do it for all stories. (I rarely use caveats and my last example funnily enough happened today. I'd read a story but I could not actually read the story at the author's LJ due to formatting issues with the font colors and etc..so I added that to my rec) Also I feel if I'm going to say a story has issues and take the time to point them out I feel like I should also have time to volunteer to beta read for the author's next story, otherwise I keep my mouth shut. I know this is probably weird and not at all how most people think but I think at one point in the past I sent an email to an author saying I liked the story but...and ended up beta reading the next story as a result.

So my recs I keep it short and simple and most people who actually use my recs on a regular basis probably know what my comments really means about a story.

As a writer, I don't mind people reccing my fics with caveats.