Hi buffymad,
My wife and I have been to most of these places. We like to spend the time quietly by ourselves touring the areas by hire car. We don't like lying on beaches and we don't drink so we usually rent an apartment, cater for outselves, and come and go as we please.
We have stayed in, or visited, most of the resorts you list. Believe me buffymad - they are all much the same. Each resort invariably consists of a long, palm-lined promenade backing an imported golden sand beach. The promenades are lined with bars, clubs, restaurants, cafes, souvenir shops, beach shops and small supermarkets. Almost all are aimed at British tourists or the legions of ex-pats. Everyone speaks English, all signs are in English and most bars or cafes invite you to watch Eastenders or 'Corrie' while you eat fish and chips or a full English breakfast. You can join in karaoke at night or watch English league football etc. Indeed, you'll hardly see anything of the local people or culture. Just imagine Blackpool or Cleethorpes transported to the sun!
Of course, many people are looking for just that - sun, sand, sea and booze, and possibly you are too. If you are, then there's little difference between all the resorts you post. However, from your list I especially enjoyed touring Majorca, the Costa del Sol and Lanzarote. Malta has few sandy beaches or bars and it is beautiful and quiet. We loved Malta but you might be disappointed if you want somewhere livelier. Other than that, my advice is to buy a medium-priced holiday (not a really cheap one) and the rest will be down to a bit of luck as to which hotel or resort is better than another.