Hmm... the apps that I'm liking a lot recently would be:
1. Facebook - I think they're slowly getting this right
2. Color Note - This app is so useful as I use it more and more. I love the password feat
3. Titanium Backup - I LOVE this app now, backing up data on my apps is a life saver especially when I play around with ROMs and have to restore sometimes.
4. Electrum Drum Machine/Sampler - Making beats is pretty fun, love spending some time doing this.
5. YouTube - I think this will forever be on my list. And with the new updates, I have less of a need to go to the full/touch site.