How do you guys 'read' abbreviations?

If it's easy to pronounce, I'll say the abbreviation. BM, CPQ, etc.

Stuff like NL, MM, doesn't roll off the tongue quite as easily and I'll do what Fiel said.

NL rolls off the tongue very well. o_o
And the mind's tongue is infinitely more dexterous anyway, so it's not relevant.

For me, if I see letters, I'll think letters. Most of the time. Exceptions are stuff like lol ("loll"), brb ("burb"), and most things that are often lowercase.