I never think to ask for reviews until my novels turn into massive, meandering dinosaurs. I'm kind of time poor at the moment, so I can't in good concience ask to swap a review of a 50k plus serial for anything that's short enough for me to read in depth.
So this time, I'm getting in early. Yay! I'm at a little over 10k words on Trilobite Park, a SF/comedy set in a the theme park of the future where people are mildly entertained by resurrected trilobites -- but at what price question mark dot dot dot. It's part of a series of related novels, but you don't have to have read any of the earlier ones as it's pretty self contained.
If you want to do a review and ask me for nothing in return, who am I to say no? But if you have a series of, say <15k words, I'm open to a swap. I'm okay with most genres, but if it's erotica or gore then I'm probably not the reviewer who would suit you best.