1st - I would recommend EVERYONE going to this site before subscribing to a site: http://www.rabbitsreviews.com/SitesSearch.aspx. This site gives very detailed reviews and has a GREAT feature at the bottom of each one where there is a user grade as well as user comments.
2nd - I apologize in advance if there are already specific review threads for any of the sites I give - Idid a peachyforum search & could only find model shrine links and frankly am not going to dig through page after page trying to find the relevant page.
KittyKarsen.com - I did not like this site at all; it is awful. As I noted in my review (http://peachyforum.com/forums/p/192169/514319.aspx#514319) of Princess Presley's site, what you see in the preview thumbnail galleries (the type with 12 or so photos) is the best of what you'll actually pay money to see. The videos were so grainy and low quality that they were barely even worth looking at. Lots of both picture and video sets overall, but mostly stuff you can find for free. Most importantly: just about, if not ALL of the content on this site is available on TeenDreams.com.
Bottom line: not at all worth the money
TeenKatie.com - See above and Princess Presley review as far as content. There were about nine "teaser-type" videos total, and just about all of the many, many photo sets (there were a lot & they did have a lot of photos in each one) were so staged-looking that they lost most of their sexual flavor. And again most of the VERY BEST photos are available for free already in thumbnail preview sites. Maybe there's more content since I had the membership last year, but was not worth the money at that point.
Bottom line: I see her as being more of a glamorous softcore-type chick. VERY attractive but not worth the money YET until more content is added. I have to admit I didn't feel to badly about spending money on this site at the time.
Nubiles.net, and Teen Dreams - Nubiles, and Teen Dreams would both be much the same type of review (both are GREAT sites and WELL WORTH the money), so I think instead I'll basically compare them. Nubiles.net would tend to get my highest praise as it has a TON of very attractive girls, is easy to use, and has high quality full length videos. Teen Dreams is much the same, has the high quality videos + you get a free subscription to another site that has a bunch of attractive porn stars. You can sort by type of video and/or type of picture set (solo, girl/girl, boy/girl, etc.). As with Nubiles.net you will find a nice amount of materials (in some cases most of the same materials) for models who now have their own websites. Heather Lightspeed is on Teen Dreams as is Eva, Kitty Karsen, "Sandy", Marketa, and others I am blanking on the names of. Teen Dreams is a little more difficult to easily navigate - a great unfortunate thing they do is rather then having a preview picture of a set or video, they just have the relevant model's same photo as the clickable thumbnail. So you have to then click on the model's generic photo first, then decide if you like the set or not. To actually get to the model's overall "file" sort of page with ALL of the content you then click on her photo again. Hard to explain, but basically Nubiles.net is much easier to find the content page of each model.
Bottom line: both sites are WELL WORTH the money, in my opinion, with Nubiles.net being my slight favorite.
Lightspeed World - I liked LS World enough to subscribe to it on two separate occasions, but that is because, I think, some of my favorite all-time models are on there. You have Heather Lightspeed, Nella pre-boob job at her finest, Jordan Capri (blow job/sex video and all), Joey AKA Little Troublemaker AKA many other names who has a lot of material, and some other very attractive chicks. I would say it's worth subscribing to at least once regardless, and if you like any of the girls listed then definately worth it. You get to choose ten of your favorite girls (I just cross-referenced the one's I hadn't heard of in a google image search).
Bottom line: worth the money for at least one month.
Raven Riley - This'll probably be the quickest review, since this site was amazing. If you like Raven Riley at all and you have the money for a subscription, then definately get one. This site has a REDICULOUS amount of content for one girl. Both nice videos and photo sets. Laid out well, and you can download entire webcam shows as well.
Bottom line: If you find Raven Riley attractive then you should definately subscribe.
That's all for now - I'm curious about a couple sites so I'll post a request for other peoples' thoughts on both of them (Karups PC and ATK Galleria).