TOS itself just never won me over. Sure there's some great episodes in there, but there's also some facepalmingly bad ones. That coupled with the 60's setting that just rubbed me the wrong way, I never could enjoy it much.
To me the TOS movies were way more enjoyable than the series itself. I probably would've seen those at some point, but they might have not been enough to make me a "trekkie" by themselves.