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As a person who's smoked a shit ton of things, I have to say Salvia is possibly my least favorite. You and your friends are not missing out on much by not having tried it before.
I've smoked salvia probably 20-25 times, and can honestly say it's a waste of effort.
The high is not what it's cracked up to be; everyone says it's so much more potent than marijuana, but in reality, it just feels harsher. It's a dirty kind of high, makes my head hurt, makes me more aggressive, and I've had friends describe a time-dilation effect similar to weed, but I haven't had the issue, nor do I care to continue experimenting with salvia to find out.