FNL is a very good show, I absolutely agree. I started watching it a few months ago and was addicted and got through 2 1/2 seasons in a couple of weeks but I actually got somewhat bored of it and haven't felt compelled to finish. I eventually will and I especially like the soundtrack on the show. Regarding Riggins, I think he was 25 when he was playing a 15 year old and it was quite obvious. I think Landry was the appropriate age. Random - I was watching Super last night with Rain Wilson and Saracen was in the movie. First time I've seen him outside of FNL.
Dexter's first few seasons and the John Lithgow season were awesome but its gotten to the point where its unwatchable.
I hated The Killing - SPOILER-
Was watching just to find out who killed Rosie even though the previous 5 or so episodes were dreadful and then we don't even find out. Unfortunately, I think I will probably watch this upcoming season atleast until the murder is resolved.
My favorite show currently is Breaking Bad. Favorite ever is BB or The Wire. Really liked the first season of Homeland, Damien Lewis was awesome, and Game of Thrones. Not usually into that genre but awesome show. I actually started to read the books as well after one of the BY posters, I believe Intzlcster, heavily recommended it (who has apparently disappeared) but got bored and decided to wait til season 2.
The two shows which I realize aren't great but was absolutely hooked for a while are Lost and Prison Break. Lost was a great show to watch over a long winter break and Prison Break had an awesome 2 season run.