iLife '11 was one of my favorite versions of the suite I ever used. It's what I used when I got my first Intel Mac in 2011 (a 2009 polycarbonate white MacBook). I still have it set up on the early 2006 17" Core Duo iMac in my collection of operational older Macs.
Of course, iPhoto was my most used iLife application during its' time. I found the adding of "events" a very handy feature in iPhoto '08, because you now also had "events" for groups of photos, that way you didn't have to make an album for everything. WAY more convenient. The editing features were also nice, but they do pale in comparison to the more extensive image editing features in Photos for MacOS (I've often referred it to as the successor to iPhoto.)
iMovie '11 got some really spiffy and useful updates after it was completely rewritten and redesigned three years before. It came with the cool Movie Trailer creator, brought back "rubberband"-style audio editing and waveforms and added other useful sound editing tools and effects, one-step video effects, a face recognition feature like the one in iPhoto, and even the ability to work with something like a classic timeline (the current iMovie strictly sticks with said classic timeline-esque layout.) I even used it to make several YouTube Poops from 2011 to 2013, before I began to mostly stick with Final Cut Pro X for making them.
I've also used GarageBand '11 for quite a few "Stupid Statement Dance Mixes" for said YouTube Poops, and it would get the job done for me pretty well. And despite not being updated at all, iDVD was also great to still have, since I'd still burn older family home movies to DVD at times, and it has such nice elegant DVD menus and navigation.
It amazes me how much iLife has fallen apart; we now only have iMovie and GarageBand, while iPhoto has since been replaced with Photos (bundled into Mac OS, as I already mentioned.)