OS3.9 tweaking suggestions ?

[fishy_fiz]

Having just recently done a fresh reinstall of Amithlon/OS3.9 Im still tweaking/tuning/adding all the extras I like/etc. I've gotten to a point where all the usual suspects (afa_os/mui/magic menu2) are installed and configured and am now going through aminet to find any useful and/or interesting bits and pieces.

While Ive been using amigas/amiga os more or less since their inception Ive never really done a lot of heavy tweaking/patching to the OS beyond what is necessary for a usable, slightly aesthetically enhanced system. I'd be interested to hear any recommendations as to what people consider worthwhile additions/tweaks/etc. for an OS3.9/rtg/ahi/68040 based system ?
Also is something like Oxypatcher/FastIEEE still worthwhile on OS3.9 ? According to the FastIEEE readme, OS3.9 math libraries have FastIEEE support built in.

Thanks in advance.

[fishy_fiz]

Thanks for the responses people.
I've gotten to the point I should probably back up....

http://www.imagecross.com/11/image-hosting-view-56.php?id=8698fishgrab.png

Still very w.i.p, and a bit generic looking, but a good starting point. System is stable wth most of the extras Ive always uses and a few more. Now comes the experimental side .....  

[fishy_fiz]

It's actually my amithlon system, so I have a few resources to spare on eye candy. Having said that though I have taken a little effort to not just be excesive because I can. Ive all my patterns/textures for example have been reduced to the color depths/sizes they require, rather than being 16/24bit, just bacuse thats what I 1st did them in. Most of the eye candy is provided by afa_os and afa_zune, which are also probably the biggest resources "wasters". (having said that though it's not too bad and I believe there's people out there using it on "real" '040 based machines).