I'm trying to go completionist, but my playtime is limited and it seems each life they bring out a new class almost... But it started as "I want that feat", but now it's moved to 'Wow I'm learning a lot about classes". I would have never tried monk but when I did I found it to be a lot of fun. I'm on my 6th life right now and I'm trying something new again.
I agree, do a 3rd TR and see how you like it first. It's a lot of XP to get.
For me it's not really the destination but the journey now... I'm enjoying it.