if you like- is pretty rubbish
The only two decent teams are funded by a sectarian rivalry between catholics and protestants, these are Rangers and Celtic. The rest of the club sides are competing for third place or lower. Average attendance in the top league is about 7000-8000. A flood of foreign players bought into the teams in recent years have reduced the national team to the same level.
The fans are passionate, and I enjoy it too, but basically, there isn't much to get excited about.