Today I have an L over MB where the respective served are 13 and 15 but if it was say 10 and 12 I might go for the MB.

My vote doesn't encapsulate my entire thought process. DEF also factors in for me.

Have to take into account the respective levels of the player.

I generally always have the L serve for the lowest rated MB in Srv. The Def stat is generally better for the L.

I'm with Jason

DEF is very likely to be better for the Libero.

Having said that Nashville have a couple of SRV 16 MBs with decent DEF and their top L hasn't got a great SRV and DEF isn't much better than #2MB's

In regards to my vote, I knew it was a thing but I've never done it

Have to take into account the respective levels of the player.

If your MBs' SRV is single digits, it isn't a difficult decision.

And a complaint: a poll without bonus!

At least I got it twice this way ... complaining.

Have to take into account the respective levels of the player.

Have to take into account the respective levels of the player.

I also take DEF into account when deciding who serves. I'll have a lower SRV Libero serve if their DEF is greater than the MB.

Eduard, as I'm sure you're discovering, complaining is a time-honored tradition here, and the primary way many of us earn RPs.

Depends on DEF comparatively. 

Thanks for all the feedback (and complaining Mr. H) on this.  Some interesting ideas here.  

The reality is:

- USA Women's Collegiate Volleyball...liberos can serve (just like in TMVL)

- USA Men's Collegiate Volleyball...liberos in D-I, D-II, and D-III cannot serve but NAIA can.

So when Max's team (D-III) plays an NAIA team Max's coach typically "agrees" with the NAIA coach to allow liberos to serve which is an advantage to Max's team.  Max serves a slow "knuckle ball" serve that moves all around and when they try to pass it will often shank it leading to a good chance of Max's team winning the point.  It only happens about twice a season in terms of NAIA matches for Max's team.