I think "a few days" is too short to judge a pool, esp. if things like "luck" are involved.

Don't believe that blockchain.info graph, look at blockorigin instead.

Lists of pools: https://bitcointalk.org/index.php?topic=104664.0 and https://en.bitcoin.it/wiki/Comparison_of_mining_pools

After Bitminter and slush, Bitparking would get my vote. They don't pay tx fee rewards, but offer 3 merged mined altcoins.