KazzyK, you should start taking them. I was very happy with Tamoxifen. Everyone is different.
There are two aspects: firstly, the long-term potential effects. That is why doctors say AIs are 'better' or 'have fewer side-effects'. However, the long-term effects of Tamoxifen don't affect everyone, there is just a slightly higher percentage of risk. For instance, you should have eye tests (mine said my eyes were unaffected). You should have tests to check you don't get cancer of the womb (again, something that can usually be easily checked and avoided - even if you did get this cancer, it would be better than a recurrence of breast cancer). We don't talk about this much here but you should inform yourself.
Then there are the immediate side-effects like hot flushes (mine got much better after a couple of months), apparently bone pains (I have never had this and AIs are more likely to cause it) and so on.
You really need to try Tam to see if you really suffer. There's no one forcing you to keep with it if you really can't tolerate it. I'm very sorry to read of vonz problems but I am post-menopausal so I have the choice.
Doctors have told me that AIs have fewer side effects, but I think they were confusing the two aspects. Arimidex was not tolerable for me, exemestan is better.
I'm sure other people will come along and tell you to try Tamoxifen for yourself.