I used to be prejudiced against it, but once I got used to it I realised it was actually pretty cool.
洋服を買ってからなかなか着ない時もありますよね。
毛嫌い ＝ prejudice
毛嫌いする ＝ to be prejudiced (against); be averse to
見慣れてきたら ＝ once I got used to (seeing) it
イケてる ＝ cool; sexy
結構イけてる ＝ pretty cool
私には似合わない ＝ (it) doesn't suit me
私には似合わないと10年ほど前に悟りそれ以来避けてきた ＝ I realised about ten years ago that it doesn't suit me and I've been avoiding it ever since.
I used to really hate wearing a white dress shirt, but now that I've gotten used to looking at myself in one, I don't look so bad after all.
この場合、次のような言い方ができますよ。
ーI used to really hate wearing a white dress shirt, but now that I've gotten used to looking at myself in one, I don't look so bad after all.
「白いシャツを着るのを毛嫌いしていたけど、見慣れたら結構イケてる」
to get used to looking at ...で「…を見慣れる」
ご参考まで！
アメリカ合衆国 
カナダ 
