Do you think domain extension such as .com .net .org affect SEO value?
I should go with .com for the most popular and it have more value for SEO or keyword rankings?
The short answer is No... What is on your website and what is pointing to your website is what counts.... The only TLDs that matter are country specific if your target audience is National e.g. .us, co.uk etc... But even that has very little weighting... Again its all about what is on your website and what points to it....
If it is a local extension then, then yes, local extensions domains/websites have more priorities in their local results. Other than that, the answer is no.
I always would try to go for a .com extension only because most people are familiar with it. Next would be a .org. But it really doesn't matter what matters is the unique engaging content you put on your site. If your content helps people then it will get shared, liked and tweeted thus giving you traffic to your site. Social engagement (comments on your site) helps as well
Technically, there isn't any SEO value what website you have taken with any domain extensions. Important note is that Extensions depend on the use. Like.. .com is going to show more socially and contrariwise, .org has more strain in a charitable way.