Whoa, that was a lot of quick feedback. Thanks!
So I guess I really had two topics in one: A) How to compare games of different genres and

The difference between a review and feedback.
For people who responded to "How to compare games of different genres": I agree with everyone and like the idea of "play/pass", but I personally wouldn't put the time into writing a full review of a game I wouldn't play :-) Which leads to the second topic...
"The difference between a review and feedback": The two have different audiences. If your goal is to help the designer out, you should always talk in first person. On our site, it's easy to do that, so the majority of everyone's posts are feedback.
Reviews on the other hand are directed at other gamers. I personally use first person in my reviews so I can make qualifications. I think of reviews as publicity, an honorable mention of sort. I've only reviewed three games but given feedback on dozens. Although I guess the problem there-in is that I'll never write a negative review, because I wouldn't review a game I didn't like. But when I write reviews, I send them to other forums in addition to this one (minus the RRR formatting) because my intention is to get other gamers to notice it.
This probably stems from my experiences with reviews - getting an official review from Penguin here at RRR made me really happy and inspired me to review
Quick Quest (play it if you haven't!), then that led to me getting involved with the forums as a whole.