I confess I haven't gone in for mods, just because they usually end up broken in the next update. There is one out there though that gives the water a more realistic wave/refective texture I've been wanting to try though.
Funny thing, I've been playing more single player recently than multiplayer. I really want to find some of those hard to find items I've been taking for granted on our multiplayer world.
Of course the downside as always is you die in SP. Lost a ton of valuable loot the other day while exploring a cave when a #$&^! Skeli kicked me off a cliff into a pool of lava.
Oh, I did start work on a new exhibit in the zoo. Digging out an underground room for cave spiders under the wolves den.