I want to share what I like about each of the main characters and my favorite episodes up to where I am now (I just saw the one with Sheldon freaking out over everyone fighting.)
Leonard: He is like the role model for why geeks make good boyfriends. He's just so nice and funny and there's something oddly attractive about him, even though he looks so squinty and sounds very nasal. He's the voice of reason for the group for the most part.
Raj: I love how he can't talk to girls without alcohol in his system. And when we does get drunk enough to talk to them, he's just hilarious! In season three, he's starting to become more assertive when it comes to his expectations with his friends. I like how he doesn't let them walk all over him. His sarcastic comments are the best! There's also something really attractive about him. He reminds me of Fez from "That 70's Show."
Howard: Anyone who can play out the Jewish humor like he can is definitely good in my book! He reminds me of Neil from Freaks and Geeks the way he thinks he's Hashem's gift to women and throws around Jewish references all the time. His clothing is atrocious and he lives with his mother, but it's hard not to find him lovable, even when he makes obnoxious comments. He's like those guys who think that girls should date him because their mothers will approve.
Sheldon: He definitely is the funniest of the group. He's just socially clueless, even though he's a genius. I love all his idiosyncracies and obsessive behaviors. He would totally drive me crazy in person, but there's something so endearing about him, like how he lets his grandma call him "Moon Pie." The stuff he says is beyond hilarious and the show would definitely not be as amazing as it is without him.
Penny: I love how she doesn't fit in with the group and yet she totally does. Definitely "girl crush" worthy, as well. I really like how she interacts with Sheldon and totally plays off of his craziness. I find it amusing that I've been watching for over two seasons now and she has yet to break away from The Cheesecake Factory to get an acting gig. I find myself hoping she'll get her big break soon.
Favorite episodes from the first two and 1/4 seasons:
The Middle Earth Paradigm: When they go to a Halloween party and Sheldon is dressed as the Doppler Effect. No, he's not a zebra!
The Loobenfeld Decay: I love the effort Sheldon goes through to make a lie seem plausible.
The Pancake Batter Anomaly: The first time we get to hear "Soft Kitty"
The Peanut Reaction: I know it's bad, but we watched this the same night after our older son had an allergic reaction to something he ate. Howard looked the same after having something with peanuts in it. So hard not to laugh!
The White Asparagus Triangulation: I love when Sheldon crashes Leonard's date and his reasoning about why.
The Killer Robot Instability: Just the beginning scene alone is enough to make me love the whole episode.
The Friendship Algorithm: Classic!
The Terminator Decoupling: Summer Glau is great with her cameo...as herself. Makes me miss "Firefly" ever so much!
The Vegas Renormalization: Why don't they serve brisket in Vegas? C'mon now! (Interesting side note, the prostitute was played by the mean girl from She's All That.)
Season 3 (so far):
The Electric Can Opener Fluctuation: I don't know what it was, but I just couldn't stop laughing!
Leonard: Can you please take that stupid hat off?
Howard: No, I wanna blend in.
Raj: To what, Toy Story?
The Gothiwitz Deviation: Tattoo sleeves allow Howard to look cool and still be buried in a Jewish cemetery. It's a win-win!
The Creepy Candy Coating Corollary: Wil Wheaton also does a great cameo appearance as himself. It's priceless to hear him say "Mee-Maw." I also love the conversation that transpires during Howard's blind date.
If you haven't seen The Big Bang Theory, I highly recommend checking it out. You don't have to know science to enjoy it, but it doesn't hurt to have a geek sense of humor. Also, check out the BBT Wiki site. It has a lot of interesting stuff!