You should. ^^
It might just be me but I think Gintama's changed... for starters, the recent episodes animation quality seem to have gotten so much better. It was almost 3D-like.
It's a bit more perverted in humour too.
Plus, the characters have almost....changed, especially Kagura. If you compare her speech and personality to her at the start I think she's quite different. (It was also good to finally see her kick som' ass fighting during the Benizukura arc.)
Hijikata and Okita have pretty much turned evil against Kondou, as well as Okita getting a bit more...I dunno, almost annoying~ :3