Yeah, I thought the "like," "love!" etc. were a bit weird-looking myself at first, even if they were nicely minimalistic.
Since this is functionally the same as a system that rates things from 0 to 3 stars (or 1 to 4 stars, although I don't like 1-to-4 'cause it fools me into thinking there's a 50%), I think actual stars would be a less surprising interface. That would also be nicer to red-green colorblind users.
On another note, I may have found a few bugs. (In case you're keeping a log, my seed for this session was "emshort.wordpress.com". I'm not using the feedback feature, 'cause I don't know if that's buggy too!) I went through several pages I don't remember, pressed the older and newer buttons, and ended up finding a link to "Notion Ink Adam tablet hands on (Pixel Qi Display)" in my recent activity even though I hadn't seen that yet. All I can guess is that either it was someone else's recent activity or else it was what I was going to get had I clicked past the article I was at. Since I couldn't press "newer" (naturally, since I don't have any history newer than the present), I pressed "older" dozens and dozens of times and annoyed myself, and then I rated the tablet article, and suddenly I realized I could press "newer" and started to do that. I expected to annoy myself again, but instead I guess I pressed the button too fast or a packet got lost or something, 'cause the loading graphic came on and stayed there. The loading graphic wasn't centered either; personally, I think that's a bug. :-p Finally, I forwarded a copied and pasted this writeup into the feedback form and sent it off along with a link to this post (so you know you can reply to me here).
Ah, I figured out the problem - the history requests were shared across all users, so if somebody else makes a request while you're browsing, you see the history for their station when you hit older or newer
:}
(This is, of course, in addition to the failed request at the end, and the layout issues)