too tight?

yeah just a question... im doing realy well right now playing realy tight.... and i mean realy tight.... ok what i wana ask is if i should loosen up a lil? ok.... well i dont play low suited connectors ex: 67h -- i also dont play low pairs that are 6 and down.... unless i can get in for the bare minumum or im on big/small blind.... so am i to tight?

anouther question: when i have a bad hand ex: 79o... and im on the small blind ill throw out my blind cause i dont wana give up the rest... should i do that or call the little extra to see the flop?

after thought: i used 79o as an example cause thats the hand i had while typing that little portion.... i was on the small blind and i called it just to see what happened... i flop came x-7-7 turn came 9 and river was x.... i cheaked the flop and the other guy bet 6k.... i waited a couple seconds the called..... on the turn i cheaked and he bet 10k... i waited again then called..... river comes and i cheak one more time and he bet 60k and i raise to 200k puting him all in for 180k.... he called and i win =)