Twitter for Mac seems overly bloated and takes too much room in my Dock. I also hate it showing up in my CMD+Tabs.
Twitter for Mac, for some reason, ate way too much CPU, and this was the sole reason I went for Tweetbot.
Other than the price tag, was there a reason you didn't go for Tweetbot?
I love making my own things. Wrapping the Twitter for mobile in a small window in the menu bar seemed like an easy enough solution. I still think it functions and performs vastly better than the new TfM.