I usually look up tabs to learn a general outline, and then any parts that sound wrong I'll just figure out by ear after dicking around for a bit. I'd definitely agree, a lot of the tabs in general out there seem like they were transcribed by someone missing one of their ears.

Hell yeah, learn some new stuff man. I need to do the same, and start learning some stuff from other genres of music. Never bad to have more material that you can jam with.