I like both of them, but HIMYM is more my style, despite my love of most things nerd or science related.
However, I've watched all of HIMYM, so now I'm working my way through BBT. I think I watched too much of it. Last night I had dreams about the manga Berserk, except Guts was Leonard. Hilariously disturbing.
Retired News Writer for the ZAM Network
WoW - Aureliano the Insane - level 90 Druid on Sen'Jin
Nanaoki - level 90 Mage on Sen'Jin