At some point I had a 50, 80, 150 and 250 for my Hasselblad. The 50 and 150 I got rid of. For nearly everything I use the 80. The 250 I use almost solely for landscapes. With regard to the 150 I found it not wide enough to be interesting and nowhere near long enough to make for an interesting composition. I can't imagine the 180 will be much better in that respect.

I recently sold my 250 purely because it was a CT and don't like the ergonomics, so spending a bit of time looking for a CFi/E at the right price (tricky to find in the UK...) although I started debating with myself whether a 350 would be better...the weight and size does get silly though...