My favorite form of learning new SEO..."I heard this from my brother's cousin's uncle"!
Google wants what Google has always wanted -- pages that provide some sort of usefulness to the people Google sends to them. Some of those will naturally have links out to other sites, some of those won't. Some will have H1 tags, some won't. Some will have keywords in the page, some will only have keywords in links pointing to the page. Some will have high PageRank, some will not.
Google looks at all different things, but it has to look at each individual page (and perhaps each site) and take it on its own merits.
The bottom line is that you should do what makes the most sense for your site and its own situation. If you want to link out to other sites because it's helpful to your visitors, then you should do it! If you don't think there will be any benefit to your visitors to link to other sites, then don't. Either way will only help or hurt you in so much as you do it just because you're trying to figure out what Google might like.
Who cares what Google might like? Does Google buy your products or services?
Funny thing is when you use common sense and think about what makes your site be the best it can be, it turns out to be exactly what Google likes (in many cases, and when Google is not broken

).
Jill