I was really enjoying season 2 (3 if including OVA dump) as it stayed true to the first season but its lack of plot & full force jokes cause it to become tedious and repetitive, similar to the first season.
I think similar to its first season, the jokes seen in the initial episodes are much better than those seen later in the season as they stand out amongst the sea of inuendos, blatant gags and references, and are unique.
By around the halfway point of the season the main cast became tedious as thier jokes were overused resulting in the characters becoming bland. Thankfully the side characters pick up their slack and give life to the rest of the season. The great journalist Hata returns & is given more screen time, the perverted teacher & maid return for a few great jokes, 'new' characters are introduced with another schools president, the Judo club gets some action & MCs freaky sister joins the party.
Season two also features recurring gag advertisements & mid show segments that make for fun moments & unexpected laughs between the sea of tedium, my favorite being the Squid.
Overall, Im not sure if its worth the watch of the full season, as its probably best to search for a highlight reel or something similar of the seasons running gags, best jokes & moments but if you need something dirty & SOL this will probably be down your alley.